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FreeBSD 11.0 - man page for rwall (freebsd section 1)

RWALL(1)						    BSD General Commands Manual 						  RWALL(1)

NAME
rwall -- send a message to users logged on a host
SYNOPSIS
rwall host [file]
DESCRIPTION
The rwall command sends a message to the users logged into the specified host. The message to be sent can be typed in and terminated with EOF or it can be in a file.
DIAGNOSTICS
rwall: RPC: Program not registered The rpc.rwalld(8) daemon has not been started on the remote host. rwall: RPC: Timed out A communication error occurred. Either the network is excessively congested, or the rpc.rwalld(8) daemon has termi- nated on the remote host. rwall: RPC: Port mapper failure - RPC: Timed out The remote host is not running the portmapper (see rpcbind(8)), and cannot accommodate any RPC-based services. The host may be down.
SEE ALSO
who(1), rpc.rwalld(8), rpcbind(8)
HISTORY
The rwall command appeared in Sun-OS.
BUGS
The sorting options are not implemented.
BSD
April 23, 1991 BSD