lucid	server	release	20150427
precise	server	release	20170502
saucy	server	release	20140709
trusty	server	release	20191107
utopic	server	release	20150708
vivid	server	release	20151219
wily	server	release	20160106
xenial	server	release	20210416
bionic	server	release	20210415
eoan	server	release	20200331
focal	server	release	20210415
groovy	server	release	20210415.1
hirsute	server	release	20210422