WALL(8) WALL(8)
NAME
wall - write to all users
SYNOPSIS
/etc/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
SEE ALSO
write(1)
DIAGNOSTICS
`Cannot send to ...' when the open on a user's tty file
fails.