rdistd man page
rdistd — remote file distribution server program
rdistd -S [ -D ]
Rdistd is the server program for the rdist command. It is normally run by rdist via rsh(1).
The -S argument must be specified. The option is required so that rdistd is not accidentally started since it normally resides somewhere in a normal user's $PATH.
Enable debugging messages. Messages are logged via syslog(3).
Print version information and exit.