I see same problem in ubuntu 16.04. The adm group was added on 11.10 & admin group existed till 12.04 (https://askubuntu.com/questions/612751/what-is-the-difference-between- the-groups-adm-and-admin). So, going forward since 12.10, admin group is no more but replaced by adm group.
In the context of keeping intended feature (i.e. Members of the admin group may gain root privileges), the fix to update "admin" to "adm" looks correct to me. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to sudo in Ubuntu. https://bugs.launchpad.net/bugs/1767801 Title: Wrong group name "admin" instead of "adm" in default sudoers file of sudo 1.8.21p2-3ubuntu1 Status in sudo package in Ubuntu: Confirmed Bug description: This is just to inform you, that the file /etc/sudoers, that comes with sudo 1.8.21p2-3ubuntu1 during a fresh install of Xubuntu 18.04, contains # Members of the admin group may gain root privileges %admin ALL=(ALL) ALL but the admin group is now named "adm" instead of "admin". This is easy to correct, but it might confuse people, that are not familiar with the sudoers file. So, I suggest to change this line to %adm ... Additional information: lsb_release -rd Description: Ubuntu 18.04 LTS Release: 18.04 apt-cache policy sudo sudo: Installiert: 1.8.21p2-3ubuntu1 Installationskandidat: 1.8.21p2-3ubuntu1 Versionstabelle: *** 1.8.21p2-3ubuntu1 500 500 http://at.archive.ubuntu.com/ubuntu bionic/main amd64 Packages 100 /var/lib/dpkg/status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/1767801/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
