命令手册chm下载地址：
http://www.linuxidc.com/Linux/2006-12/1643.htm
top：
http://www.cublog.cn/u1/34500/showart_2501413.html
http://wolfchina.blogbus.com/logs/41352023.html （top,vmstat,iostat）
free:
http://blog.chinaitlab.com/html/10/56410-160995.html
iostate:
http://www.linuxsky.org/doc/admin/200803/284.html
硬盘分区命令fdisk：
http://www.xxlinux.com/linux/article/accidence/install/20051228/776.html
linux文件系统：
http://www.linuxsir.org/main/?q=node/115
Linux syslog
http://tech.ddvip.com/2009-02/1234012018107751_4.html
防火墙设置iptables
http://www.linuxdw.com/netweb/iptables.htm
http://linux.ccidnet.com/pub/html/tech/iptables/index.htm
http://tech.ccidnet.com/art/9513/20070601/1098119_1.html
ssh配置及实现ssh免登陆Linux
http://renyongjie668.blog.163.com/blog/static/160053120101210221908/
ssh超时设置
http://www.edward-han.com/71.html
shell脚本的循环控制
http://www.cublog.cn/u2/75321/showart_1200738.html
条件判断
http://blog.csdn.net/vah101/article/details/6249006
shell脚本 getopt（s）
http://www.groad.net/bbs/read.php?tid-526.html
http://hi.baidu.com/v%CA%E9%B3%E6v/blog/item/712e69577a643ac9b745aec9.html
恢复被误删的文件
http://www.kuqin.com/linux/20090814/66752.html
awk常用命令
http://www.cnblogs.com/repository/archive/2011/05/13/2045927.html