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.\"     @(#)wall.1	8.1 (Berkeley) 6/6/93
.\"
.Dd February 24, 2012
.Dt WALL 1
.Os
.Sh NAME
.Nm wall
.Nd write a message to users
.Sh SYNOPSIS
.Nm
.Op Fl g Ar group
.Op Ar file
.Sh DESCRIPTION
The
.Nm
utility 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.
.Bl -tag -width indent
.It Fl g
Send messages to users in this group.
This option may be specified
multiple times, and any user in any of the specified groups will
receive the message.
.El
.Sh SEE ALSO
.Xr mesg 1 ,
.Xr talk 1 ,
.Xr write 1 ,
.Xr shutdown 8
.Sh HISTORY
A
.Nm
command appeared in PWB UNIX.
.Sh BUGS
The sender's
.Ev LC_CTYPE
setting is used to determine which characters are safe to write to a
terminal, not the receiver's (which
.Nm
has no way of knowing).