Book of Linux Operating System
1.Linux Shell Scripting Tutorial A Beginner's handbook
URL:http://www.freeos.com/guides/lsst/2.Operating Systems Web Site
URL:http://www.comptechdoc.org/os/3.鳥哥的 Linux 私房菜
URL:http://linux.vbird.org/http://linux-vbird.3322.org/