bionic server release 20230424 cosmic server release 20190628 disco server release 20200115 eoan server release 20200610 lucid server release 20150127 precise server release 20170330 saucy server release 20140608 trusty server release 20191107 utopic server release 20150620 wily server release 20160715 xenial server release 20210928 focal server release 20230502 groovy server release 20210622 hirsute server release 20220118 jammy server release 20230608 lunar server release 20230426