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UNIX for Dummies Questions & Answers
wall commands
Post 4822 by Optimus_P on Wednesday 1st of August 2001 09:58:12 AM
08-01-2001
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is there a command to send all terminals a message. i tired wall, but it only sends the message to who ever is logged in at a terminal. i need a command to send to every terminal no matter if someone is logged in or not.
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LEARN ABOUT DEBIAN
wall
WALL(1) User Commands WALL(1) NAME
wall -- write a message to users SYNOPSIS
wall [-n] [-t TIMEOUT] [file] DESCRIPTION
Wall displays the contents of file or, by default, its standard input, on the terminals of all currently logged in users. The command will cut over 79 character long lines to new lines. Short lines are white space padded to have 79 characters. The command will always put carriage return and new line at the end of each line. Only the super-user can write on the terminals of users who have chosen to deny messages or are using a program which automatically denies messages. Reading from a file is refused when the invoker is not superuser and the program is suid or sgid. OPTIONS
-n, --nobanner Supress banner -t, --timeout TIMEOUT Write timeout to terminals in seconds. Argument must be positive integer. Default value is 300 seconds, which is a legacy from time when people ran terminals over modem lines. -V, --version Output version and exit. -h, --help Output help and exit. SEE ALSO
mesg(1), talk(1), write(1), shutdown(8) HISTORY
A wall command appeared in Version 7 AT&T UNIX. AVAILABILITY
The wall command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. util-linux April 2011 util-linux