WALL(1) Commands and Applications WALL(1)
wall - write a message to users
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 mes-
mesg(1), talk(1), write(1), shutdown(8)
A Wall command appeared in Version 7 AT&T UNIX.
GNO 15 April 1998 WALL(1)
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