workaround for ubuntu 16.04 lts is to install the deprecated ntpdate that still works ok:
ntpdate:amd64/xenial-security 1:4.2.8p4+dfsg-3ubuntu5.3 uptodate
workaround for ubuntu 16.04 lts is to install the deprecated ntpdate that still works ok:
ntpdate: amd64/xenial- security 1:4.2.8p4+ dfsg-3ubuntu5. 3 uptodate