# Ubuntu 14.04 repo
# For more repos see https://www.ubuntuupdates.org/ppa/postgresql?dist=trusty-pgdg

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

# 14.04 repo
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main" >> /etc/apt/sources.list.d/postgresql.list'

apt update

apt install postgresql-client-9.5