Comment 21 for bug 692355

If you want to remove the message from motd without rebooting here is the command to delete the file that has the problem message cached and fully regenerate the motd:

sudo bash -c 'rm /var/lib/update-notifier/fsck-at-reboot && for file in /etc/update-motd.d/*; do $file; done > /var/run/motd' && cat /etc/motd