rwho—who is logged in on local machines

rwho [ –a ]

The rwho command produces output similar to who, but for all machines on your network. However, it does not work through gateways and host must have the directory /var/spool/rwho as well as the rwho daemon running. If no report has been received from a machine for five minutes, rwho assumes the machine is down, and does not report users last known to be logged into that machine. If a user has not typed to the system for a minute or more, rwho reports this idle time. If a user has not typed to the system for an hour or more, the user is omitted from the output of rwho, unless the –a flag is given.