1. ARSIG is a GNU Linux distribution designed especially for diskless routers, where the main (primary) boot-up device is compact-flash card. The goal is to make the "static" part of the operating system lay on the CF card, mounted as readonly. All other parts of the OS that need read-write access are mounted in RAM. ARSIG is based on Openwall GNU/*/Linux (Owl). Initial Freshmeat announcement, version 1.0_pre01 (PHDS), was released January 4, 2003. From LWN Distribution List