[Bug 1310341] Re: Upgrade from Saucy to Trusty removed my user from sudoers

[Jeff Lane]

So after fixing this by hacking sudoers in a live image, I can now do
"stuff" via sudo again.

Not sure what the problem was exactly, other than there was no entry in
sudoers for my user.

That could have been all along, however.  I noticed there's a line in
sudoers that says:

# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL

Is %admin correct?  the actual group name is adm, not admin.

And I don't know if my user was previously in the sudo group, but that
account IS part of adm.

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https://bugs.launchpad.net/bugs/1310341

Title:
  Upgrade from Saucy to Trusty removed my user from sudoers

Status in “sudo” package in Ubuntu:
  New

Bug description:
  I just did a full upgrade from Saucy to Trusty.

  After completing the upgrade and rebooting and logging in, I opened a
  terminal an attempted to add a ppa so I could try out a calendar
  indicator applet.

  However, I just discovered that the upgrade destroyed my sudoers file
  and my ONLY user account no longer has sudo access.

  Because of this, I can't do ANYTHING on my system because I don't have
  sudoers.

  So my upgrade from Saucy to Trusty has, right off the bat, left me
  with an unusable system I must now repair.

  bladernr at klaatu:~$ sudo add-apt-repository ppa:atareao/atareao
  [sudo] password for bladernr: 
  bladernr is not in the sudoers file.  This incident will be reported.
  bladernr at klaatu:~$ sudo su -
  [sudo] password for bladernr: 
  bladernr is not in the sudoers file.  This incident will be reported.
  bladernr at klaatu:~$ cat /etc/sudoers
  cat: /etc/sudoers: Permission denied
  --- 
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  InstallationDate: Installed on 2012-03-15 (765 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120307)
  NonfreeKernelModules: nvidia
  Package: sudo 1.8.9p5-1ubuntu1
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Sudoers: Error: command ['pkexec', '/bin/cat', '/etc/sudoers'] failed with exit code 126: Error executing command as another user: Request dismissed
  Tags:  trusty
  Uname: Linux 3.13.0-24-generic x86_64
  UpgradeStatus: Upgraded to trusty on 2014-04-20 (0 days ago)
  UserGroups: adm lpadmin wireshark
  VisudoCheck: Error: command ['pkexec', '/usr/sbin/visudo', '-c'] failed with exit code 126: Error executing command as another user: Request dismissed
  _MarkForUpload: True
  modified.conffile..etc.sudoers: [inaccessible: [Errno 13] Permission denied: u'/etc/sudoers']
  modified.conffile..etc.sudoers.d.README: [inaccessible: [Errno 13] Permission denied: u'/etc/sudoers.d/README']

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