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Full Discussion: sending messages through terminal
Top Forums UNIX for Dummies Questions & Answers sending messages through terminal Post 13326 by JammerFSU on Tuesday 15th of January 2002 09:09:56 PM
Old 01-15-2002
You can also use the "cat" command provided you are using serial terminals. Whereas syntax is as follows:

Assuming "junebug" is logged in on tty /dev/ttya12



cat Let's go have lunch... ok? > /dev/ttya12 (Enter)

and the text "Let's go have lunch... ok? should appear on the
screen of terminal ttya12


Another solution is to use he "wall" command. The "wall" command will broadcast the message you type in to all users who are currently logged on.
 

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LEARN ABOUT CENTOS

systemd-ask-password-console.service

SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8) 	       systemd-ask-password-console.service		   SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8)

NAME

       systemd-ask-password-console.service, systemd-ask-password-console.path, systemd-ask-password-wall.service, systemd-ask-password-wall.path
       - Query the user for system passwords on the console and via wall

SYNOPSIS

       systemd-ask-password-console.service

       systemd-ask-password-console.path

       systemd-ask-password-wall.service

       systemd-ask-password-wall.path

DESCRIPTION

       systemd-ask-password-console.service is a system service that queries the user for system passwords (such as hard disk encryption keys and
       SSL certificate passphrases) on the console. It is intended to be used during boot to ensure proper handling of passwords necessary for
       boot.  systemd-ask-password-wall.service is a system service that informs all logged in users for system passwords via wall(1). It is
       intended to be used after boot to ensure that users are properly notified.

       See the developer documentation[1] for more information about the system password logic.

       Note that these services invoke systemd-tty-ask-password-agent(1) with either the --watch --console or --watch --wall command line
       parameters.

SEE ALSO

       systemd(1), systemd-tty-ask-password-agent(1), wall(1)

NOTES

	1. developer documentation
	   http://www.freedesktop.org/wiki/Software/systemd/PasswordAgents

systemd 208												   SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8)
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