MacLochlainns Weblog

Miraculous events happen on my students’ computers almost weekly. For example, one couldn’t remember their student user’s password, which I set by default. How did they change it? They don’t recall.

Assuming you have sudoer authority on a Linux operating system, you can change a PostgreSQL user’s password as follows:

1. Assume the root user’s role with the following command:

   sudo sh

   sudo sh

2. As the root user, assume the postgres user’s role with the following command:

   su - postgres

   su - postgres

3. As the postgres user, connect to the PostgreSQL database with the following command:

   psql -U postgres

   psql -U postgres

4. Assuming the user’s name is student and you want to set the password to a trivial value like student, use the following command:

   ALTER USER student WITH ENCRYPTED PASSWORD 'student';

   ALTER USER student WITH ENCRYPTED PASSWORD 'student';

As always, I hope this helps somebody trying to sort out the syntax and workflow.