sudo echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -c -s)-pgdg main 9.5" > /etc/apt/sources.list.d/postgresql.list

wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -

apt-get update

apt-get install postgresql-9.5