May 2017
Beginner
552 pages
28h 47m
English
Content preview from Linux Shell Scripting Cookbook - Third Edition
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Sending messages to user terminals
Linux supports three applications to display messages on another user's screen. The write command sends a message to a user, the talk command lets two users have a conversation, and the wall command sends a message to all users.
Before doing something potentially disruptive (say, rebooting the server), the system administrator should send a message to the terminal of every user on the system or network.