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HP-UX 11i Version 3: February 2007

Technical documentation

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rwall — write to all users over a network


/usr/sbin/rwall hostname ...

/usr/sbin/rwall -n netgroup ...

/usr/sbin/rwall -h host -n netgroup


rwall reads a message from standard input until EOF, then sends the message, preceded by the line Broadcast Message ..., to all users logged in on the specified host machines. With the -n option, rwall sends the message to the specified network hosts defined in /etc/netgroup (see netgroup(4)).

A machine can only receive such a message if it is running rwalld, which is normally started from /etc/inetd.conf by the inetd daemon (see inetd(1M)).


The timeout is kept fairly short so that the message can be sent 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.


rwall was developed by Sun Microsystems, Inc.



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