cat http://www.9usb.net/200902/linux-cat.html
chmod http://jiangyang.iteye.com/blog/964265
touch http://linux.chinaitlab.com/command/11287.html
find http://apps.hi.baidu.com/share/detail/11177457
useradd passwd 等用户操作命令 http://blog.sina.com.cn/s/blog_49a665e10100agby.html
diff http://hi.baidu.com/single_cd/blog/item/bbc283f8efb81b394e4aea63.html
pwd
useradd -g groupname usernameuserdel -rf usernamepasswd username
groupadd groupnamegroupdel -rf groupname
chown -Rf username:groupname directoryhttp://zhidao.baidu.com/question/336295985.htmlhttp://wenku.baidu.com/view/f75f9dc34028915f804dc263.html
llhttp://blog.sina.com.cn/s/blog_54eeb5d90100k2z3.htmlhttp://www.iteye.com/problems/36464结果意义
more/head/tailhttp://www.linuxso.com/command/more.htmlhttp://fp-moon.iteye.com/blog/948757
whowho am iwhoami
clearhttp://zhangyongbluesky.blog.163.com/blog/static/183194162011810105041890/
startx
service servicename start/stop/restart
kill -9 pidkillall -9 processname
添加自己的命令，修改/etc/profile文件，之后sourcehttp://zhangyongbluesky.blog.163.com/blog/static/183194162011810105041890/
source与shell Script区别http://zhidao.baidu.com/question/59790034.html
希望有一天，自己也像他们一样，踩着单车上路，
