[Bug 1867423] Re: Update to glibc 2.31-0ubuntu5 breaks system

[Jarno Kaikkonen]

I am sorry, but I can't reach a working terminal on the system, as I
can't log in to any accounts, including root through recovery. Trying to
log in to my own account from tty instantly says "Login incorrect"
without even asking for the password, trying to access root shell from
recovery complains about missing libcrypt.so.1. Login manager doesn't
even launch.

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https://bugs.launchpad.net/bugs/1867423

Title:
  Update to glibc 2.31-0ubuntu5 breaks system

Status in glibc package in Ubuntu:
  Confirmed

Bug description:
  After upgrade to this version I'm unable to login into system. Right after update
  - I can't do anything with sudo. System immediately says that password is incorrect
  $ sudo .
  Sorry, try again.
  Sorry, try again.
  sudo: 3 incorrect password attempts
  - GUI apps which require admin rights (synaptic) also stopped working
  - After reboot SDDM can't reach login screen
  - if you try recovery mode with root parameter system complains
  /sbin/sulogin: error while loading shared libraries: libcrypt.so.1: cannot open shared object file: No such file or directory

  So after this update file
  /usr/lib/x86_64-linux-gnu/libcrypt.so.1
  got deleted.

  On Kubuntu 20.04, which was last upgraded yesterday, upgrade stopped
  with some error about unfinished configuration of libcrypt1. On Ubuntu
  20.04 (GNOME) which was last upgraded at Feb 16, upgrade went well but
  system also got broken.

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