Linux 2.6 - man page for wall (linux section 1)
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WALL(1) BSD General Commands Manual WALL(1)
wall -- write a message to users
wall [-n] [file]
Wall displays the contents of file or, by default, its standard input, on the terminals of
all currently logged in users.
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
-n Supress banner
mesg(1), talk(1), write(1), shutdown(8)
A wall command appeared in Version 7 AT&T UNIX.
The wall command is part of the util-linux package and is available from ftp://ftp.ker-
Linux 0.99 March 8, 1993 Linux 0.99
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