can be used to send messages to a large group of machines.
One of the options is to send the message to a group of machines
defined by a netgroup.
To broadcast a message to the DCS faculty machines, use the netgroup
Type the message to be sent after running
followed by a
A typical usage of
looks like this:
/usr/sbin/rwall -n ringmaster
Thunderstorms passing through - save work frequently!
You may then get a few messages which look like this:
Couldn't contact wintermute.rutgers.edu: RPC: Timed out
which can be ignored.
The users see messages like this:
Broadcast Message at 12:34 ...
From email@example.com: Thunderstorms passing through - save work frequently!
Here is a list of useful netgroups:
dcsfac DCS faculty machines (includes pyrite and remaining clients)
dcsgrad DCS grad machines
dcsug DCS Undergrad machines
math Math machines
ringmaster DCS fculty machines (aramis and clients)
This page last updated April 6, 1997.