PostgreSQL Ubuntu installation. Default port 5432.

Install

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

Test Installation

sudo -i -u postgres
psql  
\quit

Example: Create Bamboo Database

sudo -s -H -u postgres
createuser -S -d -r -P -E bamboouser
createdb -O bamboouser bamboodb

Testing the connection

sudo adduser bamboouser
sudo -i -u bamboouser
psql -d bamboodb

https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-14-04 https://confluence.atlassian.com/bamboo/postgresql-289276816.html