September 2000
Beginner
1312 pages
33h 47m
English
/usr/sbin/wall [-a][-g grpname][filename]
Use the wall (write all) command to broadcast a message to all users on a local system. You typically use wall to warn all users before shutting down a system. To send a message to all users on a system, type wall and press Return, then type the message you want to send. When the message is complete, press Control-D. wall sends
Broadcast Message from...
followed by the message.
You can send a message from a file by specifying filename. Then, the message is read in from that file.
Normally, pseudoterminals that do not correspond to rlogin sessions are ignored. Thus, when a window system is used, the message appears only on the console window. However, ...