rwall(NADM)                     19 June 1992                     rwall(NADM)


 Name

    rwall - write to all users over a network

 Syntax

    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(NF).

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

 See also

    wall(ADM), netgroup(SFF), rwalld(NADM), inetd(ADMN)

 Bugs

    The timeout is fairly short in order 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.