How to install PostgreSQL, set up a user account with a password, and publicize the port to the public internet on your Ubuntu machine? Here's a step-by-step guide to achieve this:

Update your system: First, make sure your Ubuntu system is up-to-date by running these commands:

sudo apt update
sudo apt upgrade

Install PostgreSQL: Install PostgreSQL using the following command:

sudo apt install postgresql postgresql-contrib

Verify installation: Check the status of the PostgreSQL service to ensure it is running:

sudo systemctl status postgresql

Set up a user account and password: Switch to the 'postgres' user:

sudo su - postgres

Access the PostgreSQL command line:

psql

Create a new user (replace 'myuser' with the desired username and 'mypassword' with the desired password):

CREATE ROLE myuser WITH LOGIN CREATEDB PASSWORD 'mypassword';

Exit the PostgreSQL command line:

\\q

Switch back to your original user account:

exit

Allow remote connections: To publicize the PostgreSQL port, you need to modify the postgresql.conf and pg_hba.conf configuration files.

First, find the location of the postgresql.conf file:

sudo find / -name "postgresql.conf"