sudo apt-get install postgresql sudo apt-get install pgadmin3
Now basic postgres server and gui client tool is installed
Let’s login to default user ‘postgres’ and add a password, Enter this command –
sudo -u postgres psql postgres
You get the psql command prompt and enter this command to add password for user ‘postgres’
postgres=# \password postgres
Then Ctrl + D to exit the postgres console
For additional contrib package
sudo apt-get install postgresql-contrib-9.1