/var/spool/rwho/whod.*
information about other machines
Who is logged in on local machines
rwho [-a]
The rwho command produces output similar to who, but for all machines on the local network. If no report has been received from a machine for 11 minutes then rwho assumes the machine is down, and does not report users last known to be logged into that machine.
If a users hasn't typed to the system for a minute or more, then rwho reports this idle time. If a user hasn't typed to the system for an hour or more, then the user will be omitted from the output of rwho unless the -a flag is given.
/var/spool/rwho/whod.*
information about other machines
18 releases since Debian 1.1 (Buzz); the text changed 2 times.