How to properly send messages to another screen using SSH?

Question

I have an Ubuntu box set up and a Mac from which I am trying to send a message to the Ubuntu screen

Can someone provide a short guide or a series of commands (I know it has to do with "screen") to send a message to the other computer's screen.

I've googled around, but to no avail.

Answer 1

Are you looking for the write command?

Answer 2

You can always do echo message > /dev/ttyX or echo message > /dev/pts/X. You will need privileges if it's another user's tty.

And if you want some fancy, use figlet message > /dev/pts/X to do things like this:

 _ __ ___   ___  ___ ___  __ _  __ _  ___ 
| '_ ` _ \ / _ \/ __/ __|/ _` |/ _` |/ _ \
| | | | | |  __/\__ \__ \ (_| | (_| |  __/
|_| |_| |_|\___||___/___/\__,_|\__, |\___|
                               |___/