postgresAddRemove.sh

# Install Postgres if not exists
which psql
if [ "$?" -ne 0 ]
then
	echo "Installing Postgres..."
	sudo apt-get install postgresql --yes
	echo "Altering password for user 'postgres'"
	sudo -u postgres psql -c "ALTER USER postgres PASSWORD 'password';"
else
	echo "Postgres is installed. Skipping installation..."
fi

# Uninstall postgresql
sudo apt-get --purge remove $(dpkg -l | grep postgres | awk '{ ORS = " " } {print $2}') --yes

# Delete 'postgres' user
sudo deluser postgres