SHELL

sudo apt-get -y install postgresql

# updates the mirrors
sudo apt update

# installs postgresql and some additional utilities and functionalities
sudo apt install postgresql postgresql-contrib

# starts installed postgresql service
sudo systemctl start postgresql.service

# installation creates default user postgres with below you can connect with postgres user
sudo -i -u postgres

# type psql to access postgresql prompt
psql

# postgresql installation completed

apt install postgres client

sudo apt install postgresql