update-motd not updating /etc/motd after LTS upgrade

[compdoc]

> But after deleting /etc/motd and logging in again, the file is not
>recreated:

/etc/motd is a link and should not be deleted:

lrwxrwxrwx   1 root root       13 Apr 28 10:40 motd -> /var/run/motd

Also, if there is a file named /etc/motd.tail, it can prevent the file from
being generated.

By the way, these files are owned by root, so use sudo when working with
them...