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(4). 

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

FILES

/etc/inetd.conf

SEE ALSO

wall(1M), netgroup(4), rwalld(1M), shutdown(1M)

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. 
rwall to a wildcard machine is no longer allowed due to incompatibilities with the name server, named(1M). 

CX/UX Network File System