RWALL

Section: User Commands (1C)
Updated: 4 August 1986
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NAME

rwall - write to all users over a network

SYNOPSIS

rwall hostname ...
rwall -n netgroup ...
rwall -h host -n netgroup

DESCRIPTION

Rwall reads a message from standard input until end-of-file. It then sends this message, preceded by the line ``Broadcast Message ...'', to all users logged in on the specified host machines. With the -n option, it sends to the specified network groups, which are defined in netgroup(5).

A machine can only receive such a message if it is running rwalld(8), which is normally started up by the daemon inetd(8).

BUGS

The timeout is fairly short in order to be able to send to a large group of machines (some of which may be down) in a reasonable amount of time. Thus the message may not get through to a heavily loaded machine.