[Bug 1282046] Re: Symlink /etc/motd gets removed on installation or upgrade from Precise

[Michael Schaller]

Hi Steve,

I see. So the symlink removal intentional. Then something else must be
broken on Trusty as I don't get a motd message on login on a VT or via
SSH on a freshly installed machine. Both /run/motd and /run/motd.dynamic
are present on Trusty. As soon as I add the symlink /etc/motd ->
/run/motd I also get the motd message on login/ssh.

Can it be that there is an issue with pam_motd in Trusty so that
/run/motd.dynamic isn't displayed?

Best,

Michael

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https://bugs.launchpad.net/bugs/1282046

Title:
  Symlink /etc/motd gets removed on installation or upgrade from Precise

Status in “sysvinit” package in Ubuntu:
  Incomplete

Bug description:
  Hi everyone,

  The postinst maintainer script of the initscripts package contains this code:
  if dpkg --compare-versions "$PREV_VER" lt "2.88dsf-24" ; then
     if [ -L /etc/motd ] && [ "$(readlink /etc/motd)" = "/var/run/motd"  ]; then
         rm /etc/motd
  ...

  
  This code is problematic as it removes /etc/motd for new installs and during an upgrade from Precise.
  New installs:
  $ dpkg --compare-versions "" lt "2.88dsf-24" && echo true || echo false
  true

  Upgrade from Precise:
  $ dpkg --compare-versions "2.88dsf-13.10ubuntu11.1" lt "2.88dsf-24" && echo true || echo false
  true

  
  To me it looks like this issue is present since Saucy and got introduced with version 2.88dsf-41ubuntu1.

  Best,

  Michael Schaller

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