.\" Copyright (c) 1989, 1990 The Regents of the University of California.
.\" %sccs.include.redist.roff%
.\" @(#)wall.1 6.5 (Berkeley) %G%
.Nd write a message to users
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.