rpc.rstatd is a RPC daemon which collects performance statistics from kernel on serving machine. This
implementation for the Linux Operating System also returns the number of users logged in on the remote
machine if the information is available.
It also allows to specify which network interfaces to include in the packet count. If no interface names
are specified packets from all interfaces besides the loopback interface are added up.
The statistics are queried using rup(1) , perfmeter(1) , etc. The rpc.rstatd daemon is normally invoked
by inetd(8).
rpc.rstatd uses an RPC protocol defined in /usr/include/rpcsvc/rstat.x.