Xenial verification
First, reproducing the bug with the current package:
ubuntu@xenial-berification-sssd-sudo:~$ apt-cache policy libsss-sudo
libsss-sudo:
Installed: (none)
Candidate: 1.13.4-1ubuntu1.14
Version table:
1.13.4-1ubuntu1.14 500
500 http://br.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
ubuntu@xenial-berification-sssd-sudo:~$ sudo apt install libsss-sudo
...
ubuntu@xenial-berification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files sss
Removing sss:
ubuntu@xenial-berification-sssd-sudo:~$ sudo vi /etc/nsswitch.conf
ubuntu@xenial-berification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files
Reinstall puts it back:
ubuntu@xenial-berification-sssd-sudo:~$ sudo apt install --reinstall libsss-sudo
...
ubuntu@xenial-berification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files sss
Now enabling proposed:
ubuntu@xenial-berification-sssd-sudo:~$ apt-cache policy libsss-sudo
libsss-sudo:
Installed: 1.13.4-1ubuntu1.14
Candidate: 1.13.4-1ubuntu1.15
Version table:
1.13.4-1ubuntu1.15 500
500 http://br.archive.ubuntu.com/ubuntu xenial-proposed/main amd64
Packages
*** 1.13.4-1ubuntu1.14 500
500 http://br.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
Removing sss again from nsswitch.conf:
ubuntu@xenial-berification-sssd-sudo:~$ sudo vi /etc/nsswitch.conf
ubuntu@xenial-berification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files
Doing the upgrade this time doesn't add sss back:
ubuntu@xenial-berification-sssd-sudo:~$ sudo apt install libsss-sudo
Reading package lists... Done
...
ubuntu@xenial-berification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files
And I have the new package installed now:
ubuntu@xenial-berification-sssd-sudo:~$ apt-cache policy libsss-sudo
libsss-sudo:
Installed: 1.13.4-1ubuntu1.15
Candidate: 1.13.4-1ubuntu1.15
Version table:
*** 1.13.4-1ubuntu1.15 500
500 http://br.archive.ubuntu.com/ubuntu xenial-proposed/main amd64
Packages
A fresh install, though, adds sss back, as expected:
ubuntu@xenial-berification-sssd-sudo:~$ sudo apt purge libsss-sudo
Reading package lists... Done
Building dependency tree
...
ubuntu@xenial-berification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
ubuntu@xenial-berification-sssd-sudo:~$
ubuntu@xenial-berification-sssd-sudo:~$ sudo apt install libsss-sudo
Reading package lists... Done
...
ubuntu@xenial-berification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files sss
Xenial verification succeeded.
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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Server, which is subscribed to sssd in Ubuntu.
https://bugs.launchpad.net/bugs/1781991
Title:
libsss-sudo.postinst clobbers local change to /etc/nsswitch.conf
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