Install Postgre on Ubuntu 18.04

1. Add PostgreSQL repository

Execute below 3 commands to add PostgreSQL repository.

>> sudo apt-get install wget ca-certificates
>> 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 -cs`-pgdg main" >> /etc/apt/sources.list.d/pgdg.list'

2. Install PostgresSQL

>> sudo apt-get update
>> sudo apt-get install postgresql postgresql-contrib

By default, PostgreSQL creates “postgres” if PostgreSQL has been installed successfully.

3. Check the installed PostgreSQL version

>> apt show postgresql

4. Connect to PostgreSQL

>>  sudo -u  postgres psql

5. Check connection information

Once you connect to the PostgreSQL server, you can use the below command to check connection information.

\conninfo