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.\"     @(#)wall.1	6.5 (Berkeley) 4/23/91
.\"
.\" Modified for Linux, Mon Mar  8 18:07:38 1993, faith@cs.unc.edu
.\"
.Dd March 8, 1993
.Dt WALL 1
.Os "Linux 0.99"
.Sh NAME
.Nm wall
.Nd write a message to users
.Sh SYNOPSIS
.Nm wall
.Op Ar file
.Sh DESCRIPTION
.Nm Wall
displays the contents of
.Ar file
or, by default, its standard input, on the terminals of all
currently logged in users.
.Pp
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.
.Pp
Reading from a file is refused when the invoker is not superuser
and the program is suid or sgid.
.Sh SEE ALSO
.Xr mesg 1 ,
.Xr talk 1 ,
.Xr write 1 ,
.Xr shutdown 8
.Sh HISTORY
A
.Nm
command appeared in
.At v7 .
.Sh AVAILABILITY
The wall command is part of the util-linux-ng package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.