wall Command wall
Send a message to all logged in users
/etc/wall
wall types a message to every user currently logged into the
COHERENT system, with the exception of the sender. It can be
used to inform users of information of general interest; for ex-
ample, that man has landed on the moon, or that the system is
going down in 15 minutes.
wall reads the message to be broadcast from the standard input
until end of file. When it sends the message, it prefaces it
with the herald ``Broadcast message ...'', which includes an
audible warning. Only the superuser should invoke /etc/wall (to
override access protections of the target terminals).
***** Files *****
/etc/utmp -- Current users file
/dev/tty*
***** See Also *****
commands, msg, who, write
***** Diagnostics *****
The message ``Cannot send to user on ttyname'' indicates that
wall cannot write to the given user.
COHERENT Lexicon Page 1