rusers — Display Who Is Logged In on Remote Systems
/usr/bin/rusers [-ahilu] host...
The rusers command produces output similar to who(1), but for remote systems. The listing is in the order that responses are received, but you can change this order by specifying one of the options listed below.
The default is to print out the names of the users logged in. When you specify the -l option, additional information is printed for each user.
userid hostname:terminal login date login time idle time login host
If hostname and login host are the same value, the login host field is not displayed. Likewise, if hostname is not idle, the idle time is not displayed.
A remote host responds only if it is running the rusersd daemon, ...