Rwhod
The rwhod daemon gathers information from other machines, including the status of the machine
and users on the machine.
The rwhod man page is available at http://www.rs6000.ibm.com/doc_link/en_US/a_doc_lib/cmds/aixcmds4/rwhod.htm or http://www.bsdi.com/bsdi-man?proto=1.1&query=rwhod&msection=8&apropos=0.