PostgreSQL

What is this?

PostgreSQL is a ORDBMS (Object-Relational Database Management System).

What is this for?

Storing and accessing data through the Structured Query Language (SQL).

How to install it?

Create a bash file and add the following content:

#!/bin/bash

apt-get update
apt-get -y install libpq-dev
apt-get -y install postgresql

Docs

A full list of PostgreSQL manuals can be found here.