How to change welcome message (motd) on Ubuntu 18.04 server -

The welcome message shown to a user upon the terminal login whether it is via remote SSH login or directly via TTY or terminal is a part of motd also known as "Message Of The Day" daemon. The motd message can by customized to fit individual needs of each user or administrator by modifying the /etc/motd file or script within the /etc/update-motd.d directory.
This is a companion discussion topic for the original entry at