Hi,

Please use the following terminal commands:

sudo apt-get install postgresql  

sudo su - postgres

createuser --createdb --username postgres --no-createrole --no-superuser --pwprompt odoo17

psql

ALTER USER odoo17 WITH SUPERUSER;

\q

exit

These commands set up a PostgreSQL database and a user named "odoo17" with the necessary permissions for working with Odoo 17. The user's credentials (username and password) will likely be used in the Odoo 17 configuration file to connect to the PostgreSQL database.

Hope it helps