WALL(1) General Commands Manual WALL(1)
NAME
wall - write to all users
SYNOPSIS
wall
DESCRIPTION
Wall reads its standard input until an end-of-file. It then sends this message, preceded by `Broadcast Message ...', to all logged in
users.
The sender should be super-user to override any protections the users may have invoked.
FILES
/dev/tty?
/var/run/utmp
SEE ALSO
mesg(1), write(1)
DIAGNOSTICS
`Cannot send to ...' when the open on a user's tty file fails.
4th Berkeley Distribution November 27, 1996 WALL(1)
