Command option Sample:ip mrule
Search command sample in the internet.It is the result.
ip mrule rule in multicast routing policy db
VPN over SSH - ArchWiki :
http://wiki.archlinux.org/index.php/core_utilities
ip mrule
Core Utilities - ArchWiki :
http://archive.fo/rdd9R
search Google
https://www.google.com/#q=ip mrule