Update before changing sources.list.

3.New_server_deployment/3.Initialize_APT/0_setup.sh

@@ -23,6 +23,8 @@ fi
 # migrate to Ubuntu 16.04 / apply sources.list
 if ( rgrep '14.04' /etc/lsb-release >/dev/null ); then
 	echo "Upgrading to Ubuntu 16.04."
+	apt-get update
+	apt-get dist-upgrade -y
 	cp sources16.list /etc/apt/sources.list
 	apt-get update
 	DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get dist-upgrade -o Dpkg::Options::="--force-confold" --force-yes -y