Windows postgres change password — Ваш верный помощник с OS Windows

Learn how to change the PostgreSQL password on Windows for enhanced security in your multi-tenant application design.

Changing the PostgreSQL Password on Windows
Using the PostgreSQL Command Line to Alter User Password
Best Practices for PostgreSQL Password Management
Managing PostgreSQL Passwords Effectively
PostgreSQL Installation and Configuration for Backstage

Changing the PostgreSQL Password on Windows

To change the PostgreSQL password on Windows, you can follow these steps to ensure a secure and effective process.

Step 1: Open the Command Prompt

Begin by opening the Command Prompt. You can do this by searching for ‘cmd’ in the Windows search bar and selecting the Command Prompt application.

Step 2: Access PostgreSQL

Next, you need to access the PostgreSQL command line. You can do this by navigating to the PostgreSQL installation directory. Typically, this is located at C:\Program Files\PostgreSQL\<version>\bin. You can change the directory in the Command Prompt using the following command:

cd "C:\Program Files\PostgreSQL\<version>\bin"

Replace <version> with the version number of your PostgreSQL installation.

Step 3: Connect to PostgreSQL

Once in the correct directory, connect to the PostgreSQL database using the following command:

psql -U postgres

You will be prompted to enter the current password for the postgres user. If you have forgotten this password, you may need to reset it through the PostgreSQL configuration files.

Step 4: Change the Password

After successfully logging in, you can change the password using the following SQL command:

ALTER USER postgres PASSWORD '<new_password>';

Make sure to replace <new_password> with a strong password that meets security guidelines. Remember to use a combination of upper and lower case letters, numbers, and special characters to enhance security.

Step 5: Exit PostgreSQL

Once the password has been changed, exit the PostgreSQL command line by typing:

\q

Important Considerations

Password Security: Always ensure that your password is secure and not easily guessable. Using a password manager can help generate and store complex passwords.
Connection Strings: If you use special characters in your password, remember to percent-encode them in your connection strings. For example, if your password is p@ssword, it should be represented as p%40ssword in the connection string.
User Management: It is advisable to create separate users for different applications or services that require access to your PostgreSQL database. This practice enhances security and allows for better tracking of database activity.

For more detailed information, refer to the official PostgreSQL documentation on password management.

Using the PostgreSQL Command Line to Alter User Password

To change a user’s password in PostgreSQL, you can use the ALTER USER command. This command allows you to modify the properties of a user, including their password. Here’s how to do it:

Changing a User’s Password

To change the password for a specific user, you can execute the following command in the PostgreSQL interactive terminal:

ALTER USER username WITH PASSWORD 'new_password';

Replace username with the actual username of the account you want to modify and new_password with the desired new password. Ensure that the new password meets the security requirements mentioned earlier, such as length and complexity.

Example

For instance, if you want to change the password for a user named mmuser, you would run:

ALTER USER mmuser WITH PASSWORD 'SecureP@ssw0rd!';

Important Considerations

Security: Always use a strong password that is not easily guessable. Avoid using common words or easily accessible information.
Password Management: Consider using a password manager to generate and store complex passwords securely.
Connection Strings: If you are using the password in a connection string, remember to percent-encode any special characters. For example, if your password is SecureP@ssw0rd!, it should be encoded as SecureP%40ssw0rd%21.

Verifying the Change

After executing the command, you can verify that the password has been changed successfully by attempting to connect to the database using the new credentials. If the connection is successful, the password change was successful.

Additional Resources

For more detailed information on user management and password policies in PostgreSQL, refer to the official documentation at PostgreSQL Documentation.

Best Practices for PostgreSQL Password Management

Your PostgreSQL database is the backbone of your Supabase project, making it essential to maintain strong and secure passwords for all roles. Here are some best practices to ensure your passwords are robust and secure:

Creating a Secure Password

Use a Password Manager: A password manager can generate complex passwords that are difficult to guess.
Length Matters: Aim for a password that is at least 12 characters long. Longer passwords are generally more secure.
Avoid Common Words: Steer clear of dictionary words or easily guessable phrases.
Character Variety: Incorporate a mix of uppercase letters, lowercase letters, numbers, and special symbols to enhance security.

Special Symbols in Passwords

When using special symbols in your PostgreSQL password, remember to percent-encode your password in the connection string. For example:

postgresql://postgres:p%3Dword@db.xxx.supabase.co:5432/postgres

Changing Your Project Password

Upon creating your project, you set a password for the postgres role in your database. To update this password, navigate to the Dashboard and access the database settings page. It is crucial to never share this password with third-party services unless you fully trust them. Instead, create a new user for each service that requires access. This practice not only enhances security but also aids in debugging, as you can monitor the queries executed by each role in your database using pg_stat_statements.

Additional Security Tips

Unique Passwords: Use different passwords for each account to minimize risk. If one password is compromised, others remain secure.
Avoid Personal Information: Do not include easily obtainable personal information in your passwords, such as your name or birthdate.
Secure Storage: Avoid writing down passwords on paper or storing them in unsecured locations. Use a reputable password manager instead.

By following these best practices, you can significantly enhance the security of your PostgreSQL database and protect your project’s integrity.

Managing PostgreSQL Passwords Effectively

Your PostgreSQL database is the backbone of your Supabase project, making it essential to maintain strong and secure passwords for all roles. Here are some detailed guidelines to ensure your passwords are robust and secure:

Creating a Secure Password

Use a Password Manager: This helps generate complex passwords that are hard to guess.
Length Matters: Aim for a minimum of 12 characters to enhance security.
Avoid Common Words: Steer clear of dictionary words to prevent easy guessing.
Character Variety: Incorporate upper and lower case letters, numbers, and special symbols to create a strong password.

Special Symbols in Passwords

When using special symbols in your PostgreSQL password, remember to percent-encode it in your connection string. For example:

postgresql://postgres:p%3Dword@db.xxx.supabase.co:5432/postgres

Changing Your Project Password

Upon creating your project, you set a password for the postgres role in your database. To update this password, navigate to the Dashboard and access the database settings page. It is crucial to never share this password with third-party services unless you fully trust them. Instead, create a new user for each service to maintain better control and visibility over database queries, which can be monitored using pg_stat_statements.

Setting the Password for the Postgres User

To set or change the password for the postgres user, execute the following command in the PostgreSQL shell, replacing <secret> with your desired password:

ALTER USER postgres PASSWORD '<secret>';

This command ensures that your database user has a secure password, which is vital for protecting your data. After executing the command, you can exit the PostgreSQL shell by typing \q and pressing enter, followed by exit to close the terminal.

By following these guidelines, you can ensure that your PostgreSQL database remains secure and your data is protected.

PostgreSQL Installation and Configuration for Backstage

To set up PostgreSQL for your Backstage application, follow these detailed steps to ensure a smooth installation and configuration process.

Installing PostgreSQL

Begin by installing PostgreSQL on your system. The command provided below is specifically for Linux users. If you are using a different operating system, please refer to the official PostgreSQL installation guide at PostgreSQL Download.

sudo apt-get install postgresql

Once the installation is complete, you can verify that your database is functioning correctly by executing the following command:

sudo -u postgres psql

You should see a welcome message indicating that you are connected to the PostgreSQL server:

psql (12.9 (Ubuntu 12.9-0ubuntu0.20.04.1))
Type "help" for help.

postgres=#

Setting Up the PostgreSQL User Password

For security purposes, it is crucial to set a strong password for the default postgres user. Replace <secret> with your chosen password in the command below:

ALTER USER postgres PASSWORD '<secret>';

Make sure to remember this password, as it will be required for future database access.

Password Security Best Practices

Maintaining strong passwords is essential for the security of your PostgreSQL database. Here are some best practices to consider:

Utilize a password manager to generate complex passwords.
Ensure your password is at least 12 characters long.
Avoid using common words or phrases.
Incorporate a mix of uppercase and lowercase letters, numbers, and special characters.

Special Characters in Passwords

If your password includes special characters, remember to percent-encode it when using the connection string. For example:

postgresql://postgres:p%3Dword@db.xxx.supabase.co:5432/postgres

Updating Your Project Password

When you initially created your project, you were prompted to set a password for the postgres role. This password can be updated through the Dashboard under the Database Settings page. It is advisable to create separate users for different services to enhance security and facilitate debugging. This way, you can monitor each role’s queries using pg_stat_statements.

Connecting to PostgreSQL Using DBeaver

DBeaver is a powerful, open-source database management tool that simplifies the process of connecting to PostgreSQL databases. Follow these steps to establish a connection:

Step 1: Launch DBeaver

Open the DBeaver application on your computer.

Step 2: Create a New Connection

Click on the «New Database Connection» button (the + symbol) in the toolbar or select «New Database Connection» from the «Database» menu.

Step 3: Select PostgreSQL

In the dialog that appears, choose «PostgreSQL» from the list and click «Next.»

Step 4: Enter Database Credentials

Fill in the required fields with your database information:

Host: The hostname of your PostgreSQL server.
Port: Default is 5432, change only if necessary.
Database: Name of your PostgreSQL database (default is «postgres»).
Username: Your PostgreSQL username.
Password: The password you set for the postgres user.

Step 5: Additional Connection Settings

In the «Connection settings» window, you can check the «Show all databases» option to view all databases in the Database Navigator panel.

Step 6: Test the Connection

Before finalizing, click on the «Test Connection» button to ensure everything is configured correctly. If successful, you will see a «Connected» message. If not, double-check your settings and make any necessary adjustments.

Introduction

Resetting the root (or superuser) password in PostgreSQL is a common task when you forget or need to change the password for security reasons. For Windows users, there are a few approaches you can take to reset the password. In this article, we will explore several solutions to reset the PostgreSQL root password on Windows.

Solution 1: Use pgAdmin

pgAdmin is a popular graphical tool to manage PostgreSQL databases, which can be used to reset passwords without needing to interact with the command line.

The steps to follow:

Open pgAdmin from your program menu.
Connect to the desired PostgreSQL server.
Navigate to the ‘Login/Group Roles’ node in the browser.
Right-click the user whose password you wish to reset and select ‘Properties’.
Go to the ‘Definition’ tab and enter the new password.
Click ‘Save’ to apply changes.

Pros:

User-friendly interface makes the process simple.
Does not require command-line knowledge since this is a GUI-based solution.

Cons: Requires pgAdmin to be installed and accessible. You can learn how to set up and configure pgAdmin in this article: How to set up PostgreSQL and pgAdmin on Windows.

Solution 2: Edit pg_hba.conf File

Editing the pg_hba.conf file to allow unauthenticated access temporarily, then resetting the password through the command-line interface or SQL shell.

Here are what we’re going to do:

Locate pg_hba.conf, usually in ‘C:\Program Files\PostgreSQL\\data’.
Open pg_hba.conf with a text editor as an administrator.
Change the method for local connections to ‘trust’ and save the file.
Restart the PostgreSQL service from the Windows Services panel.
Connect to PostgreSQL using the psql command-line tool or SQL shell without a password.
Reset the password using the following SQL command: ALTER USER postgres WITH PASSWORD 'newpassword';
Restore the original pg_hba.conf settings and restart the PostgreSQL service

Pros:

This method does not require any additional tools.
All changes are reversible.

Cons:

Requires file system and possibly administrative access.
It may have security implications if not done carefully.

Conclusion

Resetting the root password for PostgreSQL on Windows can be accomplished using a range of methods. Whether through a graphical interface like pgAdmin for ease-of-use or directly manipulating server configuration files for a more hands-on approach, picking the right method depends on your level of comfort and access permissions. Always remember to revert any temporary security changes you make, such as altering the pg_hba.conf file, to prevent unauthorized access to your database system.

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Last updated on August 1st, 2024 at 06:14 am

Often database administrators need to change user password in PostgreSQL, for database management and website administration. In fact, it is a best practice to regularly change user passwords to avoid security breaches. In this article, we will look at how to change user password in PostgreSQL. You can use these steps to change postgres password in Ubuntu, Windows and other Linux systems. You can also use it to change default postgres password.

Here are the steps to change user password in PostgreSQL. PostgreSQL provides ALTER USER and ALTER ROLE statements to change user password in PostgreSQL. They both have similar syntax.

1. Log into PostgreSQL

Open terminal and run the following command to log into PostgreSQL. Replace username and dbname with your username and database name respectively.

$ sudo -u username psql dbname

Also read : How to change user to superuser in PostgreSQL

2. Change User Password Using ALTER USER

We will use the ALTER USER command to change user password. Please note, Here is its syntax.

ALTER USER username WITH PASSWORD 'password';

In the above command, you need to specify the username whose password you want to change, and also the new password for that user.

Run the following ALTER USER command to change user password. Replace testuser and newpassword with

ALTER USER testuser WITH PASSWORD 'newpassword';

Similarly, if you want to change password for postgres user, modify the above command as shown.

ALTER USER postgres WITH PASSWORD 'newpassword';

Also read : How to Copy data from one table to another in SQL

Sometimes you may need to expire a password after a specific date. In such cases, use VALID UNTIL clause with ALTER USER statement. Here’s the above SQL query modified to set password expiration date as December 31, 2024.

ALTER USER testuser WITH PASSWORD 'newpassword'
VALID UNTIL 'December 31, 2024';

3. Change Password with ALTER ROLE

You can also use ALTER ROLE command to change user password in PostgreSQL. Please note, ALTER ROLE command will send your new password to database server, in plain text. Therefore, it will be visible in PostgreSQL server logs. Nevertheless, here is its syntax.

ALTER ROLE username WITH PASSWORD 'password';

Just as in the case of ALTER USER, you need to specify the new password along with username whose password you want to change.

Here is the command to change password of user ‘testuser’.

ALTER USER testuser WITH PASSWORD 'newpassword';

Here too, you can set a password to expire at a specific date with VALID UNTIL clause as shown below. Here is an SQL query to expire password on Dec 31, 2024.

ALTER USER testuser WITH PASSWORD 'newpassword'
VALID UNTIL 'December 31, 2024';

4. Verify Change

You can verify that password expiry timestamp using the \du command followed by username, as shown below.

postgres-# \du super

Role name | Attributes
-----------+---------------------------------------------
super | Password valid until 2050-12-31 00:00:00+07

Conclusion

As you can see, it is very easy to change user password in PostgreSQL in irrespective of operating system. It is always a system administration best practice to regularly change database user passwords, or at least set it with an expiry date. You can use either ALTER USER or ALTER ROLE command to change user password, as per your requirement. Please note, both these statements are supported only in PostgreSQL>=12.

Need a reporting tool for PostgreSQL? Ubiq makes it easy to visualize data in minutes, and monitor in real-time dashboards. Try it Today!

Sreeram Sreenivasan is the Founder of Ubiq. He has helped many Fortune 500 companies in the areas of BI & software development.

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Are you facing difficulty in‌ resetting your ‍Postgresql password on the Windows operating system? It can be a difficult job, but with the⁢ right steps, you can easily reset your postgresql password on Windows. It is important to note that resetting your⁤ postgresql password‌ on Windows is ⁢different from resetting on other operating systems. With this article, you will learn how to do⁢ a postgresql password reset windows and some⁢ of the best ways to reset Postgresql password quickly and securely. Relevant keywords⁤ related to postgresql password reset windows include “;Postgresql‌ Reset” and “Postgresql Password ⁤Reset Windows”.

1. Resetting⁣ Your PostgreSQL Password⁢ in Windows

Whether you forgot the password to your PostgreSQL server, or you need to ⁣update⁤ it for⁢ security reasons, ⁣ can be tricky. Fortunately, there’s a few simple steps you ‍can take to quickly reset your PostgreSQL⁤ password.

First, open up the Command ‍Prompt application. To ‍do this, select the search bar in your Windows menu bar and enter “Command Prompt”. ⁣Right-click it and select the‍ “Run as administrator” option. Once the‍ Command Prompt window opens, enter⁣ the following command ‍to log ‌into your ⁣server.

psql -U postgres
password

After entering the two commands,⁢ type in the new password for your‌ PostgreSQL server, then‌ type it again to confirm. Click‍ “Enter”⁣ and your PostgreSQL password should now be changed!‍ Once‌ you’ve confirmed the new password, you can close ⁢the Command Prompt window.

2.‍ Assessing the⁣ Issue and Taking the Necessary Steps

Analyzing the Problem

With ⁤any problem, it’s important to take ‌a considered, measured ⁤approach ⁣and assess ‌the situation. It means laying out the facts and ‍actively listening⁤ to all the stakeholders before ⁣making decisions. It’s also important to question any assumptions you might have that could be influencing your own‍ perceptions. When assessing the problem, think about what caused the issue in⁣ the first place ⁤and the different ⁣criteria you’ll need to consider to evaluate the best course of action.

Taking Action

Once you’ve established the facts ⁣and examined the various possibilities, ⁤you’re in‌ a better position to ⁣move forward. Here are a few tips on ⁤taking action:

Think about time ‌constraints ‍and‍ the steps needed to be taken to resolve the problem as soon as possible ‌
Assess the necessary resources and determine if they are feasible to obtain
Allocate ⁤the workload if needed and appoint a team ⁤leader‌ to ensure everything runs smoothly
⁤ Listen to ⁤feedback⁤ from other ⁣people that could help⁣ you make better decisions
Involve ⁤stakeholders‍ in the ⁣process‌ to ensure everyone is on board ⁣with the plan

Finally, carry‌ out the ‍plan in regular, manageable steps. Monitor any changes that result from taking ⁣action, and be ⁤sure to keep the team members and stakeholders⁣ updated⁢ on any progress.

3. Following the Directions to ‌Reset Your PostgreSQL Password

Resetting⁣ Your PostgreSQL Password

Don’t worry if you’ve‍ forgotten or lost your PostgreSQL password! Fortunately, the process to reset it is straightforward. Here are the steps you need to take:

Start by launching PostgreSQL ⁤on your‌ system.
From there, open the⁣ SQL Shell and‍ sign ‍in with the PostgreSQL superuser.
Next, type in the following command to assign ⁤a new password to the desired user: ALTER USER user_name_here‌ WITH PASSWORD ⁤new_password_here;
Finally, exit the SQL Shell, and you’ll be done.

If you need to ⁣update the password of the superuser, the process is the same but the‍ command you’ll type in is slightly different – ALTER USER postgres WITH PASSWORD new_password_here;. In either case, make sure to⁤ save the password in a secure, memorable⁤ place so you won’t⁢ have to worry about resetting‍ your PostgreSQL password again.

4. Securing PostgreSQL Databases for⁤ Windows‌ Users

Protect Your⁣ Data with These Security Essentials

For ⁤Windows users considering ‍PostgreSQL, there ⁤are several steps that should be ⁤taken to secure‌ your database. By understanding ⁣the security basics that apply to all databases, you’ll⁢ be sure⁤ to ⁣protect your data and prevent unauthorized access. Here are a few tips⁢ to get you started:

Start with a strong password policy; make sure⁢ everyone with access to ⁢your⁤ database has a unique and⁣ secure password ⁤that⁢ is regularly updated.
Encrypt your queries and ‌data; this way only ⁣authorized users can read and write data.
Restrict access‍ to only those you trust; ‌once users have been set up, ensure that permissions ‍are updated ‌regularly to limit user access to only what is needed.
Monitor and audit regularly; ⁤keep an eye ⁢on what is happening with ⁤your system to quickly spot suspicious activity.

You should also ⁢consider ⁢configuring your system’s firewall to help⁢ protect your PostgreSQL ‍database from attack. The firewall ⁣helps control which computers can access your database and⁤ can be ‌used ⁢to block any suspicious activity. Make sure to configure the firewall to allow only those connections‍ that are necessary for the system to ⁢function. Additionally, ‍use the PostgreSQL audit trail ⁢to monitor⁤ user activity and review the logs to ensure that ⁢all access attempts have been authorized.

Postgres User Data Overview

PostgreSQL User	Address Method	User Password	Administrative Privileges	Database Data Directory
postgres	trust host replication	actual password	superuser privileges	default folder destination
softactivity	postgres with time	admin login password	super system admin rights	installation directory
username	md5 with trust	authentication password	user with Administrator rights	installation location
superuser	super user postgres	master password	Administrator for security reasons	log file
softactivity	command in psql	service account password	replication privilege	config file

Q&A

Q: What ‍is‌ PostgreSQL?
A: PostgreSQL is an Open Source relational database system that stores and retrieves⁤ data securely.

Q: How⁢ can I reset⁣ the password for PostgreSQL in ⁤Windows?
A: To ⁢reset your PostgreSQL password in⁢ Windows,‍ you⁢ will need to access the ‘postgres’ Windows user ‌account. You can do this ⁤by going to the Windows command line and entering ‘net user postgres ⁤ [password]’, replacing the [password] with your desired password.

Q: How can I reset the password for the ‘postgres’ user in Postgresql on a Windows system?
A: You can reset the password for the ‘postgres’ user in Postgresql on Windows by accessing the configuration file and using SQL commands. First, locate the configuration file in the installation directory. Then, open the file and locate the line that begins with “TYPE DATABASE USER ADDRESS” and add “METHOD md5” at the end of the line. Save the changes and restart the Postgres server. Finally, connect to the database server using the ‘postgres’ user and set a new password using the SQL command: ALTER USER postgres PASSWORD ‘secure-new-password’.

Sources: PostgreSQL Documentation, Progress Software Corporation

Q: What should I do if I receive error messages related to password authentication when trying to access a Postgresql database?
A: If you encounter error messages related to password authentication while trying to access a Postgresql database, you may need to reset the password for the relevant user. You can reset the password using SQL commands in the command line. Make sure to use the correct syntax for setting a new password for the user in single quotes.

Sources: PostgreSQL Documentation, Progress Software Corporation

Q: Can I use popular password managers to securely store Postgres passwords?
A: Yes, you can use popular password managers to securely store Postgres passwords. Password managers offer features for securely storing and managing passwords, ensuring that your passwords are kept safe and easily accessible when needed for authentication.

Sources: Progress Software Corporation, Security Experts

Q: What are the recommended authentication methods for connecting to a Postgresql database securely?
A: For secure authentication when connecting to a Postgresql database, it is recommended to use the MD5 authentication method. This method encrypts passwords before sending them over the network, adding an extra layer of security to prevent unauthorized access.

Sources: PostgreSQL Documentation, Security Experts

Conclusion

Resetting ⁣your PostgreSQL password windows can be a daunting task. Fortunately, there is now a⁣ hassle-free workaround that doesn’t require‍ you⁤ to ‍reset your password ‌again. LogMeOnce one of the leading secure password ‍managers available for Windows, LogMeOnce offers an alternative solution in‍ which you can ⁣easily reset your PostgreSQL password with just a few steps. The time spent on setting up a FREE LogMeOnce account is well worth it,⁣ and you don’t need ⁣to worry about losing your data with its unbeatable security system designed to protect your information from hackers and phising attempts. makes password resetting easier and more secure than ever before, so take advantage of this great opportunity today and ⁣reset your ⁢Postgresql password windows without ‌any worries and conveniently!

Neha Kapoor is a versatile professional with expertise in content writing, SEO, and web development. With a BA and MA in Economics from Bangalore University, she brings a diverse skill set to the table. Currently, Neha excels as an Author and Content Writer at LogMeOnce, crafting engaging narratives and optimizing online content. Her dynamic approach to problem-solving and passion for innovation make her a valuable asset in any professional setting. Whether it’s writing captivating stories or tackling technical projects, Neha consistently makes impact with her multifaceted background and resourceful mindset.

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How do I change the password for a PostgreSQL user?

asked Oct 4, 2012 at 5:45

To log in without a password:

sudo -u user_name psql db_name

To reset the password if you have forgotten:

ALTER USER user_name WITH PASSWORD 'new_password';

rmtheis

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answered Oct 4, 2012 at 5:55

solaimuruganvsolaimuruganv

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To change the PostgreSQL user’s password, follow these steps:

Then in the psql console, change the password and quit:

postgres=# password postgres
Enter new password: <new-password>
postgres=# q

Or using a query:

ALTER USER postgres PASSWORD '<new-password>';

Or in one line

sudo -u postgres psql -c "ALTER USER postgres PASSWORD '<new-password>';"

Note:

If that does not work, reconfigure authentication by editing /etc/postgresql/9.1/main/pg_hba.conf (the path will differ) and change:

local     all         all             peer # change this to md5

local     all         all             md5 # like this

Then restart the server:

sudo service postgresql restart

answered Oct 4, 2012 at 5:50

Clint BugsClint Bugs

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You can and should have the users’ password encrypted:

ALTER USER username WITH ENCRYPTED PASSWORD 'password';

answered Feb 21, 2015 at 8:58

yglodtyglodt

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I believe the best way to change the password is simply to use:

password

in the Postgres console.

Per ALTER USER documentation:

Caution must be exercised when specifying an unencrypted password with
this command. The password will be transmitted to the server in
cleartext, and it might also be logged in the client’s command history
or the server log. psql contains a command password that can be used
to change a role’s password without exposing the cleartext password.

Note: ALTER USER is an alias for ALTER ROLE

xlm

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answered Aug 30, 2017 at 16:55

Viktor NordlingViktor Nordling

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To change the password using the Linux command line, use:

sudo -u <user_name> psql -c "ALTER USER <user_name> PASSWORD '<new_password>';"

answered May 25, 2015 at 23:14

Vajira LasanthaVajira Lasantha

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To the change password:

 sudo -u postgres psql

Then

password postgres

Now enter the new password and confirm.

Then q to exit.

answered Jun 29, 2019 at 19:09

Akitha_MJAkitha_MJ

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Go to your PostgreSQL configuration and edit file pg_hba.conf:

sudo vim /etc/postgresql/9.3/main/pg_hba.conf

Then change this line:

Database administrative login by Unix domain socket
local      all              postgres                                md5

to:

Database administrative login by Unix domain socket
local   all             postgres                                peer

Then restart the PostgreSQL service via the ‘sudo’ command. Then

psql -U postgres

You will be now entered and will see the PostgreSQL terminal.

Then enter

password

And enter the new password for the PostgreSQL default user. After successfully changing the password again, go to the pg_hba.conf and revert the change to «md5».

Now you will be logged in as

psql -U postgres

with your new password.

answered Oct 9, 2014 at 14:03

Setting up a password for the postgres role

sudo -u postgres psql

You will get a prompt like the following:

postgres=#

Change password to PostgreSQL for user postgres

ALTER USER postgres WITH ENCRYPTED PASSWORD 'postgres';

You will get something as follows:

ALTER ROLE

To do this we need to edit the pg_hba.conf file.

(Feel free to replace nano with an editor of your choice.)

sudo nano /etc/postgresql/9.5/main/pg_hba.conf

Update in the pg_hba.conf file

Look for an uncommented line (a line that doesn’t start with #) that has the contents shown below. The spacing will be slightly different, but the words should be the same.

    local   postgres   postgres   peer

    local   postgres   postgres   md5

Now we need to restart PostgreSQL, so the changes take effect

sudo service postgresql restart

answered Oct 30, 2021 at 10:05

CHAVDA MEETCHAVDA MEET

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To request a new password for the postgres user (without showing it in the command):

sudo -u postgres psql -c "password"

answered Mar 3, 2018 at 4:05

lcnicolaulcnicolau

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This was the first result on google, when I was looking how to rename a user, so:

ALTER USER <username> WITH PASSWORD '<new_password>';  -- change password
ALTER USER <old_username> RENAME TO <new_username>;    -- rename user

A couple of other commands helpful for user management:

CREATE USER <username> PASSWORD '<password>' IN GROUP <group>;
DROP USER <username>;

Move user to another group

ALTER GROUP <old_group> DROP USER <username>;
ALTER GROUP <new_group> ADD USER <username>;

answered Apr 21, 2016 at 20:53

Salvador DaliSalvador Dali

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If you are on Windows.

Open pg_hba.conf file and change from md5 to peer.

Open cmd and type psql postgres postgres.

Then type password to be prompted for a new password.

Refer to this Medium post for further information & granular steps.

answered Jun 13, 2020 at 19:27

Timothy MachariaTimothy Macharia

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The configuration that I’ve got on my server was customized a lot, and I managed to change the password only after I set trust authentication in the pg_hba.conf file:

local   all   all   trust

Don’t forget to change this back to password or md5.

answered Jan 11, 2014 at 20:39

ruruskyiruruskyi

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For my case on Ubuntu 14.04 (Trusty Tahr), installed with PostgreSQL 10.3: I need to follow the following steps

su - postgres to switch the user to postgres
psql to enter the PostgreSQL shell
password and then enter your password
Q to quit the shell session
Then you switch back to root by executing exit and configure your pg_hba.conf (mine is at /etc/postgresql/10/main/pg_hba.conf) by making sure you have the following line

local all postgres md5
Restart your PostgreSQL service by service postgresql restart
Now switch to the postgres user and enter the PostgreSQL shell again. It will prompt you for a password.

answered Mar 25, 2018 at 19:47

haxporhaxpor

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Use this:

password

Enter the new password you want for that user and then confirm it.
If you don’t remember the password and you want to change it, you can log in as «postgres» and then use this:

ALTER USER 'the username' WITH PASSWORD 'the new password';

answered Feb 12, 2018 at 11:52

Chris DareChris Dare

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TLDR:

On many systems, a user’s account often contains a period, or some sort of punctuation (user: john.smith, horise.johnson). In these cases, a modification will have to be made to the accepted answer above. The change requires the username to be double-quoted.

Example

ALTER USER "username.lastname" WITH PASSWORD 'password';

Rationale:

PostgreSQL is quite picky on when to use a ‘double quote’ and when to use a ‘single quote’. Typically, when providing a string, you would use a single quote.

answered Jun 1, 2020 at 18:28

FlyingVFlyingV

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This is similar to other answers in syntax, but it should be known that you can also pass the MD5 hash value of the password, so you are not transmitting a plain text password.

Here are a few scenarios of unintended consequences of altering a users password in plain text.

If you do not have SSL and are modifying remotely you are transmitting the plain text password across the network.
If you have your logging configuration set to log DDL statements log_statement = ddl or higher, then your plain text password will show up in your error logs.
If you are not protecting these logs, it’s a problem.
If you collect these logs/ETL them and display them where others have access, they could end up seeing this password, etc.
If you allow a user to manage their password, they are unknowingly revealing a password to an administrator or low-level employee tasked with reviewing logs.

With that said, here is how we can alter a user’s password by building an MD5 hash value of the password.

PostgreSQL, when hashing a password as MD5, salts the password with the user name and then prepends the text «md5» to the resulting hash.
Example: «md5″+md5(password + username)

In Bash:

echo -n "passwordStringUserName" | md5sum | awk '{print "md5"$1}'

Output:

md5d6a35858d61d85e4a82ab1fb044aba9d

In PowerShell:

[PSCredential] $Credential = Get-Credential

$StringBuilder = New-Object System.Text.StringBuilder

$null = $StringBuilder.Append('md5');

[System.Security.Cryptography.HashAlgorithm]::Create('md5').ComputeHash([System.Text.Encoding]::ASCII.GetBytes(((ConvertFrom-SecureStringToPlainText -SecureString $Credential.Password) + $Credential.UserName))) | ForEach-Object {
    $null = $StringBuilder.Append($_.ToString("x2"))
}

$StringBuilder.ToString();

## OUTPUT
md5d6a35858d61d85e4a82ab1fb044aba9d

So finally our ALTER USER command will look like

ALTER USER UserName WITH PASSWORD 'md5d6a35858d61d85e4a82ab1fb044aba9d';

Relevant links (note I will only link to the latest versions of the documentation. For older, it changes some, but MD5 is still supported a ways back.)
create role
The password is always stored encrypted in the system catalogs. The ENCRYPTED keyword has no effect, but is accepted for backwards compatibility. The method of encryption is determined by the configuration parameter password_encryption. If the presented password string is already in MD5-encrypted or SCRAM-encrypted format, then it is stored as-is regardless of password_encryption (since the system cannot decrypt the specified encrypted password string, to encrypt it in a different format). This allows reloading of encrypted passwords during dump/restore.
Configuration setting for password_encryption
PostgreSQL password authentication documentation
Building PostgreSQL password MD5 hash value

answered Aug 20, 2019 at 19:52

jkdbajkdba

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And the fully automated way with Bash and expect (in this example we provision a new PostgreSQL administrator with the newly provisioned PostgreSQL password both on OS and PostgreSQL run-time level):

  # The $postgres_usr_pw and the other Bash variables MUST be defined
  # for reference the manual way of doing things automated with expect bellow
  #echo "copy-paste: $postgres_usr_pw"
  #sudo -u postgres psql -c "password"
  # The OS password could / should be different
  sudo -u root echo "postgres:$postgres_usr_pw" | sudo chpasswd

  expect <<- EOF_EXPECT
     set timeout -1
     spawn sudo -u postgres psql -c "\password"
     expect "Enter new password: "
     send -- "$postgres_usr_pwr"
     expect "Enter it again: "
     send -- "$postgres_usr_pwr"
     expect eof
EOF_EXPECT

  cd /tmp/
  # At this point the 'postgres' executable uses the new password
  sudo -u postgres PGPASSWORD=$postgres_usr_pw psql 
    --port $postgres_db_port --host $postgres_db_host -c "
  DO $$DECLARE r record;
     BEGIN
        IF NOT EXISTS (
           SELECT
           FROM   pg_catalog.pg_roles
           WHERE  rolname = '"$postgres_db_useradmin"') THEN
              CREATE ROLE "$postgres_db_useradmin" WITH SUPERUSER CREATEROLE
              CREATEDB REPLICATION BYPASSRLS
 PASSWORD '"$postgres_db_useradmin_pw"' LOGIN ;
        END IF;
     END$$;
  ALTER ROLE "$postgres_db_useradmin" WITH SUPERUSER CREATEROLE
  CREATEDB REPLICATION BYPASSRLS
PASSWORD  '"$postgres_db_useradmin_pw"' LOGIN ;
 "

answered Oct 20, 2019 at 8:35

Yordan GeorgievYordan Georgiev

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Change password to «postgres» for user «postgres»:

# ALTER USER postgres WITH ENCRYPTED PASSWORD '<NEW-PASSWORD>';

answered Oct 30, 2021 at 10:34

I was on Windows (Windows Server 2019; PostgreSQL 10), so local type connections (pg_hba.conf: local all all peer) are not supported.

The following should work on Windows and Unix systems alike:

backup pg_hba.conf to pg_hba.orig.conf e.g.
create pg_hba.conf with only this: host all all 127.0.0.1/32 trust
restart pg (service)
execute psql -U postgres -h 127.0.0.1
enter (in pgctl console) alter user postgres with password 'SomePass';
restore pg_hba.conf from 1. above

answered Mar 5, 2021 at 13:46

Andreas CovidiotAndreas Covidiot

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Check file pg_hba.conf.

In case the authentication method is ‘peer’, the client’s operating system user name/password must match the database user name and password. In that case, set the password for Linux user ‘postgres’ and the DB user ‘postgres’ to be the same.

See the documentation for details: 19.1. The pg_hba.conf File

answered Oct 2, 2020 at 17:30

In general, just use the pgAdmin UI for doing database-related activity.

If instead you are focusing more in automating database setup for your local development, CI, etc.

For example, you can use a simple combination like this.

(a) Create a dummy super user via Jenkins with a command similar to this:

docker exec -t postgres11-instance1 createuser --username=postgres --superuser experiment001

This will create a super user called experiment001 in you PostgreSQL database.

(b) Give this user some password by running a NON-Interactive SQL command.

docker exec -t postgres11-instance1 psql -U experiment001 -d postgres -c "ALTER USER experiment001 WITH PASSWORD 'experiment001' "

PostgreSQL is probably the best database out there for command line (non-interactive) tooling. Creating users, running SQL, making backup of database, etc.

In general, it is all quite basic with PostgreSQL, and it is overall quite trivial to integrate this into your development setup scripts or into automated CI configuration.

answered Nov 1, 2019 at 17:41

99Sono99Sono

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Using pgAdmin 4:

Menu Object → Change password…

answered Sep 8, 2022 at 12:59

Most of the answers were mostly correct, but you need to look out for minor things. The problem I had was that I didn’t ever set the password of «postgres», so I couldn’t log into an SQL command line that allowed me to change passwords. These are the steps that I used successfully (note that most or all commands need sudo or root user):

Edit the pg_hba.conf file in the data directory of the DB cluster you’re trying to connect to.
- The folder of the data directory can be found by inspecting the systemd command line, easily obtained with systemctl status postgresql@VERSION-DB_CLUSTER. Replace VERSION with your psql version and DB_CLUSTER with the name of your database cluster. This may be main if it was automatically created, so, e.g., postgresql@13-main. Alternatively, my Bash shell provided auto-complete after entering postgresql@, so you could try that or look for the PostgreSQL services in the list of all services (systemctl -a). Once you have the status output, look for the second command line after CGroup, which should be rather long, and start with /usr/lib/postgresql/13/bin/postgres or similar (depending on version, distro, and installation method). You are looking for the directory after -D, for example /var/lib/postgresql/13/main.
Add the following line: host all all 127.0.0.1/32 trust. This allows for all users on all databases to connect to the database via IPv4 on the local machine unconditionally, without asking for a password.

This is a temporary fix and don’t forget to remove this line again later on. Just to be sure, I commented out the host all all 127.0.0.1/32 md5 (md5 may be replaced by scram-sha-256), which is valid for the same login data, just requiring a password.
Restart the database service: systemctl restart postgresql@... Again, use the exact service you found earlier.
Check that the service started properly with systemctl status postgresql@....
Connect with psql, and very importantly, force psql to not ask for a password. In my experience, it will ask you for a password even though the server doesn’t care, and will still reject your login if your password was wrong. This can be accomplished with the -w flag.

The full command line looks something like this: sudo -u postgres psql -w -h 127.0.0.1 -p 5432. Here, postgres is your user and you may have changed that. 5432 is the port of the cluster-specific server and may be higher if you are running more than one cluster (I have 5434 for example).
Change the password with the password special command.
Remember to remove the password ignore workaround and restart the server to apply the configuration.

answered Apr 13, 2021 at 9:05

In this Postgresql tutorial, we are going to learn about “Postgresql set user password”, which means changing the password of an existing user in the Postgres database on different environments like Windows, Ubuntu, etc.

We are going to cover the following topics.

How to set user password in PostgreSQL in windows OS
Set user password in PostgreSQL in ubuntu
Change user password using pgadmin in PostgreSQL

In Postgresql, We can change the password of the user using the below syntax.

Syntax:

ALTER USER user_name WITH PASSWORD 'new_password';

Here ALTER USER is a command that changes the attributes of a PostgreSQL user account, user_name is the name of the user whose password is to be altered and new_password is the password that you want to set for the user.

We can change password of a Postgresql user account using the command line in windows.

The following are the instructions to change the password of the user.

Open CMD on your computer using CTRL+R and type cmd in the box, then hit Enter from your keyboard.

Enter into psql command prompt as postgres user using below command.

If it asks for a password, then enter the password of the user and remember the password.

psql -U postgres

Now change the password of the current user postgres.

ALTER USER postgres WITH PASSWORD '23456';

Now remember this new password and forget the password that we have remembered before for a user named postgres.

Exit from the psql prompt.

q -- To exit from psql prompt in Postgresql databast

PostgreSQL set user password windows

We have successfully change the password of a user named Postgres.

Now log in again with the new password of user Postgres.

psql -U postgres

if it asks for a password, enter the new password that we have set recently.

Postgresql set user password windows

Read: How to create a table in PostgreSQL

Postgresql set user password ubuntu

In Ubuntu, we can change the password of the Postgresql user account using the terminal.

Open the terminal using CTRL+ALT+T from your keyboard and log into the Postgres prompt using the below command.

sudo su - postgres

Enter into psql prompt.

psql

Now change the password of the user named postgres.

ALTER USER postgres WITH PASSWORD '23456';

Exit from psql prompt and logout from Postgres prompt.

exit -- To exit from psql and postgres prompt

Postgresql set user password ubuntu

From the above output, we see the output “ALTER ROLE”, which means the password changed successfully.

Now again log in with the new password and if it asks for a password, then enter the new password.

sudo -i -u postgres

You will successfully be logged in.

Read: PostgreSQL installation on Linux

Postgresql change user password pgadmin

In Postgresql, we can also change the user password from the pgAdmin application.

The following are the instructions to change passwords in the Postgresql database.

Open pdAdmin, go to Browser section and expand icon > in front of Server then expand the icon > in front of Login/Group Roles.

Postgresql change user password pgadmin

Now select postgres user from Login/Group Roles, right-click on that and click on option Properties.

Postgresql change user password pgadmin

After clicking on Properties, a Login Role-postgres dialog appears, click on the Definition tab and enter the password then click on the Save button at the bottom right corner.

Postgresql change user password pgadmin

After clicking on Save, we have successfully changed the password of a user named postgres. Now, close the pgAdmin application, and log in again with the new password.

You may also like some of our latest articles on PostgreSQL.

PostgreSQL WHERE IN
Postgres date range
Postgresql if else
PostgreSQL CASE
Postgresql create user with password
PostgreSQL DATE Format
PostgreSQL ADD COLUMN
PostgreSQL vs SQL Server
Postgres RegEx
Postgresql date between two dates
Postgresql create database

So in this tutorial, we have learned about “Postgresql set user password” and changed the password of existing users. We have covered the following topics.

How to set user password windows in PostgreSQL
Set user password ubuntu in PostgreSQL
How to change user password pgadmin in PostgreSQL

I am Bijay having more than 15 years of experience in the Software Industry. During this time, I have worked on MariaDB and used it in a lot of projects. Most of our readers are from the United States, Canada, United Kingdom, Australia, New Zealand, etc.

Want to learn MariaDB? Check out all the articles and tutorials that I wrote on MariaDB. Also, I am a Microsoft MVP.

(Note: Not much of this is relevant to readers using PostgreSQL 9.2 or above from the EDB installers, which now have a greatly simplified default install using the NETWORK SERVICE, though you can still configure other accounts).

I have used net user postgres postgres
to reset the password for my database but instead of a success message I am getting "System error 5 has occurred. Access is denied."

You’ve reset (or tried to reset) the service account password. PostgreSQL won’t run as Administrator for security reasons and the installer generally sets it up with a «postgres» user account in PostgreSQL 9.1 and older¹. On Windows you can’t start a service as a user without saving the password of the user in the registry, so that’s what the installer does.

If you change the password for the Windows user account postgres, the PostgreSQL service can no longer start. So don’t do that, you’ll have to fix the service configuration to store the updated password.

Thankfully I think another mistake prevented you from doing that. It looks like you’re probably running your command prompt without using «Run as Administrator» on an unprivileged Windows user account or a machine with UAC, so it isn’t running with the access permissions required to change the password for the postgres user.

Before you try to change that password, make sure it’s really what you want to do. What’s the problem you’re trying to solve here? Are you attempting to install a database update or something else that’s asking for the password for the postgres Windows user?

Most likely you’re just trying to log in to the database. For that, you use the (unfortunately completely unrelated) password stored in the database its self. Since you’ve lost/forgotten it you’ll have to reset it:

Find your pg_hba.conf, usually in C:Program FilesPostgreSQL9.1datapg_hba.conf
If necessary, set the permissions on it so that you can modify it; your user account might not be able to do so until you use the security tab in the properties dialog to give yourself that right by using an admin override. Alternately, find notepad / notepad++ in your start menu, right click, choose «Run as administrator», then use File->Open to open pg_hba.conf that way.
Edit it to set the «host» line for user «postgres» on host «127.0.0.1/32» to «trust». You can add the line if it isn’t there; just insert:
```
host all postgres 127.0.0.1/32 trust
host all postgres ::1/128      trust # if IPv6 is in use
```
before any other lines. (You can ignore comments, lines beginning with #).
Restart the PostgreSQL service from the Services control panel (start->run->services.msc)
connect using psql or PgAdmin-III or whatever you prefer
ALTER USER postgres PASSWORD 'postgres'
remove the line you added to pg_hba.conf or change it back
restart PostgreSQL again.

See: How do I reset the postgres password for PostgreSQL on Windows?

^1. 9.2 now uses the NETWORKSERVICE account, which doesn’t require a password, so this problem goes away.

Change the User Password in Postgres Using Windows
Change the User Password in Postgres Using Linux

In this tutorial, we will change the user password in Postgres.

Open the SQL Shell (psql) from the menus or search bar.
Connect to the default database with the default port. If you set up with default settings, then the configuration should look like this:

    Server [localhost]:
    Database [postgres]:
    Port [5432]:
    Username [postgres]:
    Password for user postgres:

If you put the field blank and press empty, it will take the default values shown between the square bracket.

Then, log in with the default password you set during the installation. If you’re successful, then you will get the SQL command line:

psql (14.0)
WARNING: Console code page (437) differs from Windows code page (1252)
         8-bit characters might not work correctly. See psql reference
         page "Notes for Windows users" for details.
Type "help" for help.

postgres=#

Now, if you want to see all the user lists, type the command:

postgres=# select * from USER;
   user
----------
 postgres
(1 row)

You need to alter the user information using ALTER to change the user password. The query format for changing the user password:

postgres=# ALTER USER postgres WITH PASSWORD 'ROOT';
ALTER ROLE
postgres=#

Instead of postgres, you can type your username, which you want to update, and instead of Root, you can use your defined password.

Or, there’s another method for changing the passwords without writing any SQL query. After opening the psql command line, type password user_name.

Then it will ask for a new password and again ask to retype the new password.

postgres=# password postgres
Enter new password: <Enter-your-password>
Enter it again: <Retype-your-password>
postgres=#

Change the User Password in Postgres Using Linux

You can enter the psql console without any password. Use the sudo command.

Here’s how you can log in without a psql password:

$sudo -u <username> psql <database>

Use the above method to change the password for a user in psql.

It’s a good practice to save the user password encrypted. You can use the following command:

postgres=# ALTER USER postgres WITH ENCRYPTED PASSWORD 'ROOT';

Sometimes you may need to change user password in PostgreSQL, for database management and website administration. In this article, we will look at how to change user password in PostgreSQL. You can use these steps to change postgres password in Ubuntu, Windows and other Linux systems. You can also use it to change default postgres password.

Here are the steps to change user password in PostgreSQL.

1. Log into PostgreSQL

Open terminal and run the following command to log into PostgreSQL. Replace username and dbname with your username and database name respectively.

$ sudo -u username psql dbname

Also read : How to change user to superuser in PostgreSQL

2. Change User Password

We will use the ALTER USER command to change user password. Here is its syntax.

ALTER ROLE username WITH PASSWORD 'password';

In the above command, you need to specify the username whose password you want to change, and also the new password for that user.

Run the following ALTER USER command to change user password. Replace testuser and newpassword with

ALTER USER testuser WITH PASSWORD 'newpassword';

Similarly, if you want to change password for postgres user, modify the above command as shown.

ALTER USER postgres WITH PASSWORD 'newpassword';

Also read : How to Copy data from one table to another in SQL

ALTER USER testuser WITH PASSWORD 'newpassword'
VALID UNTIL 'December 31, 2020';

As you can see, it is very easy to change user password in PostgreSQL in Ubuntu, CentOS and other systems.

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About Author

Summary: in this tutorial, you will learn how to change the password for a user in PostgreSQL.

To change the password of a PostgreSQL user, you use the ALTER ROLE statement as follows:

ALTER ROLE username   
WITH PASSWORD 'password';
</code>
Code language: HTML, XML (xml)

In this statement, to change the password of a user:

First, specify the username who you want to change the password.
Second, provide the new password wrapped within single quotes (‘).

For example, the following statement changes the password of the super user to secret123.

ALTER ROLE super WITH PASSWORD 'secret123';
Code language: SQL (Structured Query Language) (sql)

Sometimes, you want to set the password valid until a date and time. In this case, you use the VALID UNTIL clause:

ALTER ROLE username
WITH PASSWORD 'new_password'
VALID UNTIL timestamp;
Code language: SQL (Structured Query Language) (sql)

Note that if you omit the VALID UNTIL clause, the password will be valid for all time.

The following statement sets the expiration date for the password of super user to December 31 2020:

ALTER ROLE super
VALID UNTIL 'December 31, 2020';
Code language: SQL (Structured Query Language) (sql)

To verify the result, you can view the detailed information of user:

postgres=# du super;
                            List of roles
 Role name |                 Attributes                  | Member of
-----------+---------------------------------------------+-----------
 super     | Superuser, Cannot login                    +| {}
           | Password valid until 2020-12-31 00:00:00+07 |
Code language: SQL (Structured Query Language) (sql)

Note that using the ALTER ROLE statement will transfer the password to the server in cleartext. In addition, the cleartext password may be logged in the psql’s command history or the server log.

In this tutorial, you have learned how to change the password of a PostgreSQL user using the ALTER ROLE statement.

Was this tutorial helpful ?

Introduction to Postgres Change Password

In this article, we will learn how we can change the Postgres Change Password of the user if present and if not how we can assign a password to the user for further authenticated usage by him in the PostgreSQL database server. There are two methods to do so. The first method involves using the ALTER query statement to change the password and the second method is to use the meta-command password in PostgreSQL’s psql utility.

To proceed with changing the password process, we first need to understand how password mechanism works in PostgreSQL and what password policy is set to the default superuser which is most often user named Postgres.

In any Unix distribution system of PostgreSQL, there are two types of authentication methods namely ident and peer. The default authentication method depends on which version of PostgreSQL does it use and how is PostgreSQL installed on your machine.

Ident Authentication method: In this method, TCP port with 113 as port number authenticates the user’s credentials where the identification server of the operating system is running.

Peer Authentication Method: In the peer authentication method, the current user’s password of PostgreSQL is matched with the password of the operating system user’s password.

Syntax

Format 1:

Explanation: Using the above alter command the password of the user can be changed and along with that other options can also be reassigned.

Name: It is the name of the user or role whose properties or password you want to change.

Option: We can change multiple parameters and privileges associated with the user using this format.

CREATEDB: This can be specified if you want to give the privilege to the user to create a new database

NOCREATEDB: This can be mentioned if you want to restrict the user from creating any new database.

CREATEUSER: This property can be specified to allow the user to create new users.

NOCREATEUSER: When this property is mentioned in the query in the above format the user won’t be able to create new users.

ENCRYPTED: This property determines whether the password stored in the pg_catalog’s pg_shadow table is stored in the form of an MD5 encrypted format.

UNENCRYPTED: The password is not stored in encrypted format in pg_catalog. If neither ENCRYPTED or UNENCRYPTED property is specified and neither this is done while user creation then the default password storing mechanism is decided based on password_encryption configuration variable.

PASSWORD: The new password is the string that you want to set as the password for the user. If this field is not specified and the user doesn’t have any previously set password to it then no authentication will be done for the user and the user can log in to the system without mentioning the password. But in case if you switch to a password authentication system then the user won’t be able to log in.

VALID UNTIL expiry time: This field can be used if you want to allow the set password up to some specific period. This field if the timestamp up to which you want to permit the assigned password to work.

Examples to Implement Postgres Change Password

Below are examples mentioned:

Example #1

We will firstly login to the system by Postgres default user. Here we have assigned a password to the Postgres role already. So, we will enter the password.

Code:

sudo su - postgres

Output:

Example #2

Further, let us check all the users which are present in the database server by firing the command using psql promo:

Code:

select username from pg_catalog.pg_user;

Output:

Example #3

Let us try to login using a user:

Code:

sudo su – a;

Output:

Example #4

As we have forgotten the password associated to that user assigned to it while its creation, we will reset it to pay by using the format 1 ALTER USER query in the following way:

Code:

ALTER USER a WITH ENCRYPTED PASSWORD 'payal';

Output:

As the output is ALTER ROLE. The password has been reset successfully.

Format 2:

ALTER USER name RENAME TO alteredName

This format is only used to alter the name of the user to some other name “alteredName”.

Example #5

Code:

ALTER USER a RENAME TO payal;

Output:

Example #6

Let us verify the available users in our database server now.

Code:

SELECT usename FROM pg_catalog.pg_user;

Output:

Example #7

Code:

ALTER USER name SET parameter { TO | = } { targetValue | DEFAULT }

the parameter can be any configuration property of PostgreSQL. You can see all the configuration properties by firing the command

SHOW ALL;

Output:

Example #8

ALTER USER name RESET parameter

This command is used to reset the value of any field related to the user. Example –

Now, in case if we want to reset the password of the payal user. we can do so by using the query statement :

Code:

ALTER USER payal RESET password;

Output:

That gives the output “ALTER ROLE” which means that password for payal user has been reset successfully.

Example #9

MetaCommand to change password: In PostgreSQL, we have this amazing functionality called meta-commands that can be used with the help of psql utility. MetaCommands are short commands which are provided to make the working

of database administrator easy and efficient. These metacommands internally fire the SQL commands which are basic like ALTER, CREATE, SELECT, etc. One such meta-command for changing the password of the user is available and named password. It asks to enter the password and then reenter the password for confirmation and then sets the entered password for that user.

password

Let us check the working of metacommand with the help of an example. Suppose we want to change the password of Postgres user after login to the Postgres database. Then we will query for the same in the following steps:

Code:

psql -d postgres -U postgres password

Output:

Conclusion

We can change the password of the user either by using the ALTER command or metacommand password in PostgreSQL.

Introduction

How to change postgres account password? In case of forgotten password, hence unable to access the database management GUI. This is my experience when using Windows. It might be the same with other operating system.

The Command Prompt Way

First let me put a note using command prompt technique. The GUI technique is much simpler and presented later in this same writeup.

To do this using command prompt. It is good to know that in windows there will be 2 account. One is postgres windows user account. The other is database admin account. Which is also called postgres.

Edit E:PostgreSQL9.1pg_hba.conf and set the localhost method to trust instead of md5.
Do not forget to save.
Use the usual Windows way to reset the password of windows user account.
Open up a command prompt and use runas to open another command prompt as postgres user.
open up Services manager and restart postgresql service. There might be need to update the postgres user account password setting in the service property at this step.
Now running psql will not ask any password.
Use the following sql to set the user password

ALTER USER Postgres WITH PASSWORD ‘<newpassword>’

Revert the pg_hba.conf localhost method back to md5 .
Restart postgresql service in Services manager.

Using pgAdmin to Graphically Reset the Password

This is simpler and I would say faster. Just accidentally found that if pg_hba.conf localhost method is set to trust. There is no need to enter password when connecting to the database using pgAdmin.

Some of the step are similar to when using command prompt technique.

1. Edit E:PostgreSQL9.1pg_hba.conf and set the localhost method to trust instead of md5. Do not forget to save.

2. Open up Services manager and restart postgresql service.

3. Run pgAdmin and connect to the database. Note that it will not ask the password since we are in the trust mode.

4. Scroll down to look for postgres database user under Login Roles and open up the properties windows.

5. Surprisingly there is a tab named Definition that allow for password change. Do the necessary!

6. After this is done, revert back changes to pg_hba.conf file to md5 and restart the postgresql service in Services manager.

7. You should be able to connect to the database. This time using the new password!

In Closing

I learn the hard way about not writing up this stuff earlier. Wasting time looking for good tutorial on how to do this

Источник

Changing the PostgreSQL Password on Windows

Step 1: Open the Command Prompt

Step 2: Access PostgreSQL

Step 3: Connect to PostgreSQL

Step 4: Change the Password

Step 5: Exit PostgreSQL

Important Considerations

Related answers

Using the PostgreSQL Command Line to Alter User Password

Changing a User’s Password

Example

Important Considerations

Verifying the Change

Additional Resources

Related answers

Best Practices for PostgreSQL Password Management

Creating a Secure Password

Special Symbols in Passwords

Changing Your Project Password

Additional Security Tips

Related answers

Managing PostgreSQL Passwords Effectively

Creating a Secure Password

Special Symbols in Passwords

Changing Your Project Password

Setting the Password for the Postgres User

Related answers

PostgreSQL Installation and Configuration for Backstage

Installing PostgreSQL

Setting Up the PostgreSQL User Password

Password Security Best Practices

Special Characters in Passwords

Updating Your Project Password

Connecting to PostgreSQL Using DBeaver

Step 1: Launch DBeaver

Step 2: Create a New Connection

Step 3: Select PostgreSQL

Step 4: Enter Database Credentials

Step 5: Additional Connection Settings

Step 6: Test the Connection

Related answers

Introduction

Solution 1: Use pgAdmin

Solution 2: Edit pg_hba.conf File

Conclusion

1. Log into PostgreSQL

2. Change User Password Using ALTER USER

3. Change Password with ALTER ROLE

4. Verify Change

Conclusion

Related posts:

1. Resetting⁣ Your PostgreSQL Password⁢ in Windows

2.‍ Assessing the⁣ Issue and Taking the Necessary Steps

3. Following the Directions​ to ‌Reset Your PostgreSQL Password

4. Securing PostgreSQL Databases for⁤ Windows‌ Users

Postgres User Data Overview

Q&A

Conclusion

Note:

Setting up a password for the postgres role

Change password to PostgreSQL for user postgres

To do this we need to edit the pg_hba.conf file.

Update in the pg_hba.conf file

Now we need to restart PostgreSQL, so the changes take effect

Example

Postgresql set user password ubuntu

Postgresql change user password pgadmin

Change the User Password in Postgres Using Linux

1. Log into PostgreSQL

2. Change User Password

Related posts:

Introduction to Postgres Change Password

Syntax

Examples to Implement Postgres Change Password

Example #1

Example #2

Example #3

Example #4

Example #5

Example #6

3. Following the Directions to ‌Reset Your PostgreSQL Password