How to Install PostgreSQL on Ubuntu 22.04

PostgreSQL (pronounced “post-gress-Q-L”) is a household name for open source relational database management systems. Its object-relational meaning that you’ll be able to use objects, classes database schemas and in the query language.  In this tutorial, we will show you how to install and connect to your PostgreSQL database on Ubuntu 16.04.

Step 1: Install PostgreSQL

First, we’ll obtain the authentication keys need to validate packages from the PostgreSQL repo.

wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -sc)-pgdg main" > /etc/apt/sources.list.d/PostgreSQL.list'

As a best practice, we will update our server before installing PostgreSQL.

apt-get -y update

After the update is complete, we’ll run the following command to install PostgreSQL

apt-get install postgresql-10

Step 2: Logging into PostgreSQL

Once installed, PostgreSQL creates a default user named “postgres”.  This user works in a way different from that of other popular databases like MySQL.  PostgreSQL users can change the method of authentication, but by default, it uses a mode called ident. Ident takes your OS username and compares it with the allowed database usernames.

You must first switch to the default Postgres user

su - postgres

You’ll now see that you are logged in as that user via the prompt change

postgres@host2:~$

Afterward, you can then enter the PostgreSQL terminal by typing:

psql

You’ll know you are connected by the message below:

psql (9.5.14)
Type "help" for help.
postgres=#

Step 3: Logging out of PostgreSQL

To exit out of your PostgreSQL environment use the following command

\q

Now that you’ve created your PostgreSQL world it’s time to stretch your feet!  Let’s start creating and listing databases using our world renown Cloud VPS servers.