JAWUG

A very basic very powerful purpose built Linux for the WRT and WAG. All command line though get it here : http://openwrt.org/ and then goto the OpenWRTHowTo to see some basic commands.

FreiFunk is a very good alternative since its is based on OpenWrt get it here : http://download.olsrexperiment.de/ipkg/_g+gl/ and then goto the FreifunkHowTo.