Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: pam (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1847902
Title:
pam_nologin should optionally exclude users of the "wheel" group from
its access restrictions
Status in pam package in Ubuntu:
Confirmed
Bug description:
During a remote system upgrade (18.04 to 19.04) something went south and
after reboot the machine is stuck at some place in its boot sequence. SSH
works, but trying to log-in with a sudo-capable user results in: "System is
booting up. Unprivileged users are not permitted to log in yet. Please come
back later. For technical details, see pam_nologin(8)."
As Ubuntu has moved away from full root users with passwords + allowing root
logins over SSH, I'm totally locked out from my remote system.
There is a bug reported for pam_nologin requesting to provide separate
exclusion mechanism but in the meantime it is possible to implement a
workaround to exclude administrative users from nologin restriction.
Here's the bug:
https://github.com/linux-pam/linux-pam/issues/42
And here is the workaround that should be implemented in Ubuntu:
https://github.com/linux-pam/linux-pam/issues/42#issuecomment-367450193
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