xenial	server	release	20160610	i386	server/releases/xenial/release-20160610/ubuntu-16.04-server-cloudimg-i386.tar.gz	ubuntu-xenial-16.04-i386-server-20160610
xenial	server	release	20160610	amd64	server/releases/xenial/release-20160610/ubuntu-16.04-server-cloudimg-amd64.tar.gz	ubuntu-xenial-16.04-amd64-server-20160610