Have you ever watched the movie Hacker? Sometimes, there are scenes where they show hacking activities and leave messages or even communicate directly through the Linux terminal.
Yup, let me introduce you to wall. Wall is a utility to display messages in the terminal intended for all users currently logged into the system.
Wall allows us to communicate with users currently logged into our system. Here are some examples:
wall [options] [<file> | <message>]
For simulation, try logging into the same system through two different terminals, then type the following command in one of the terminals:
wall "Your message"
Or, you can simply run the command:
wall
Then, enter your message. Once done, press Ctrl+D to send it.
The other terminal will display the message you sent.
Alright, that's it, haha, let's go!
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