addgroup is a perl script, so you can inspect it to see what's going on. You can get additional information about the error running with:
sudo VERBOSE=1 addgroup --system ntp I think what we're seeing is that your ntp group is a user group (gid >= 1000) instead of a system group (gid < 1000). >From your output above, it looks like you're hitting this logic: if ($action eq "addsysgroup") { # Check if requested group already exists and we can exit safely my $ret = existing_group_ok($new_name, $new_gid); if ($ret == 3) { print STDERR "$0: " if $verbose; printf STDERR (gtx("The group `%s' already exists as a system group. Exiting.\n"), $new_name) if $verbose; exit RET_OK; } if ($ret == 1) { print STDERR "$0: " if $verbose; printf STDERR (gtx("The group `%s' already exists and is not a system group. Exiting.\n"), $new_name) if $verbose; exit RET_OBJECT_ALREADY_EXISTS; } So, you're exiting 1 due to the gid of group ntp being > 1000. The fix here would be to apt-get remove --purge ntp ; the --purge flag will trigger the ntp.postrm script to remove the group first. Then when you re-install, it will install the ntp group with --system flag and allocate a GID under <1000. See if that helps you moving forward. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1372051 Title: ntp postinst user/group add commands are not idempotent To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/1372051/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs