Preparing to unpack .../rfkill_2.34-0.1ubuntu9.3_amd64.deb ...
Unpacking rfkill (2.34-0.1ubuntu9.3) over (2.34-0.1ubuntu9.1) ...
Setting up openssh-sftp-server (1:8.2p1-4ubuntu0.4) ...
Setting up openssh-server (1:8.2p1-4ubuntu0.4) ...
rescue-ssh.target is a disabled or a static unit, not starting it.
Setting up command-not-found (20.04.5) ...
Setting up rfkill (2.34-0.1ubuntu9.3) ...
Setting up lightdm (1.30.0-0ubuntu4~20.04.2) ...

Configuration file '/etc/pam.d/lightdm'
 ==> Modified (by you or by a script) since installation.
 ==> Package distributor has shipped an updated version.
   What would you like to do about it ?  Your options are:
    Y or I  : install the package maintainer's version
    N or O  : keep your currently-installed version
      D     : show the differences between the versions
      Z     : start a shell to examine the situation
 The default action is to keep your current version.
*** lightdm (Y/I/N/O/D/Z) [default=N] ? dpkg: error processing package lightdm (--configure):
 end of file on stdin at conffile prompt