How to broadcast message to all logged in users through Terminal?

Question

Is there a way of broadcasting a message to all logged in users through Terminal so that it is printed in the Terminals and TTYs of all other logged-in users? I am running Ubuntu GNOME 15.10 with GNOME 3.18.

Answer 1

Use the wall command, it can be used as so:

echo "message" | wall

This will broadcast the message in Terminal to all logged in users through Terminal.