http://red2.sunderland.ac.uk/python/genindex.html
http://www.adminsehow.com/2011/09/iptables-packet-traverse-map/
mysql:
linux kernel
http://ilinuxkernel.com/
python
http://www.pythoner.com/
http://www.crifan.com
ftp目录
http://www.crifan.com/files/doc/docbook/