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How to change a password for PostgreSQL on Linux via Command line?

Approx. read time : 2 min

PostgreSQL is known for supporting many client authentication methods, so, in this case, we will only be concerned about two : (i) password and (ii) md5.


1) The instruction is specially used for changing a password in PostgreSQL.

2) The instructions are performed by using a MilesWeb Core Managed CentOS 7 server and we are logged in a root.

3) PostgreSQL is already installed.

Step 1: Switch to the PostgreSQL user: postgres

N case you are working from a default PostgreSQL installation, then PostgreSQL will be configured with the user postgres.

As we are logged in as root, it can be assumed that root doesn’t have a user for PostgreSQL, switch to the default PostgreSQL user: postgres

Now, attempt to connect to PostgreSQL :

At the prompt, enter your password

The correct and valid response will be similar to :

Step 2: Add and Change the password for the PostgreSQL user: postgres

Using the following command you can change the password for your current user, which is now postgres :

Enter your new password. Re-enter it to confirm.

Now quit the PostgreSQL interface using the following command :

Tip :

You can perform all the above-mentioned steps in only one command :

That’s it.

Also Read :

Learn to Install PostgreSQL on Ubuntu 18.04

How To Install Chkrootkit Security Scanner On Ubuntu 18.04

Sonam Wagh
With an interest in doing something creative daily, Sonam works as a Digital Marketing Executive. She likes to write technical blogs related to web hosting, digital marketing, and other IT topics. She also likes to spend her leisure time on social media to find different strategies for client engagement.