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How to Install PostgreSQL 9.6 on Ubuntu ?

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PostgreSQL is a powerful, open source object-relational database system. It has more than 16 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness.
 
I am going to share few steps to install PostgreSQL 9.6 on Ubuntu 16.04.
First, check the version of Ubuntu:
lsb_release -sc
You need to add the latest PostgreSQL repository for the latest version, otherwise It will install old version. This is for trusty version.
sudo add-apt-repository "deb https://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main"
Update and Install PostgreSQL 9.6:
sudo apt-get update
sudo apt-get install postgresql-9.6
Default postgres super user and postgres database is created. You need to set a password for the postgres super user. 
ubuntu@:~$ sudo passwd postgres
Enter new UNIX password:****
Retype new UNIX password:****
passwd: password updated successfully
If service is not started, you can start the PostgreSQL service. 
sudo service postgresql start
Connect PostgreSQL server using postgres user:
ubuntu@:~$ su postgres
Password:****
Create a sample database:
createdb database_name
Connect to that database:
psql -d database_name
Create a sample table:
create table Test (rno integer);
Exit to database session:
\q
Exit to PostgreSQL server:
exit

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