artful	server	release	20180102
hardy	server	release	20121003
karmic	server	release	20100826
lucid	server	release	20150427
maverick	server	release	20120410
natty	server	release	20121028
oneiric	server	release	20130509
precise	server	release	20170502
quantal	server	release	20140409
raring	server	release	20140111
saucy	server	release	20140709
trusty	server	release	20171208
utopic	server	release	20150723
vivid	server	release	20160203
wily	server	release	20160715
xenial	server	release	20171208
yakkety	server	release	20170719
zesty	server	release	20171208