WALL(1) NetBSD Reference Manual WALL(1)
NAME
wall - write a message to users
SYNOPSIS
wall [file]
DESCRIPTION
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- sages.
SEE ALSO
mesg(1), talk(1), write(1), shutdown(8)
HISTORY
A wall command appeared in Version 7 AT&T UNIX. 4th Berkeley Distribution June 6, 1993 1
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