# Shell脚本

 * 读《Shell脚本学习指南》，更新笔记在[Tool_Settings 仓库](https://github.com/Wangjunyu/Tool_Settings)
 * 基本配置的内容在[Tool_Settings 仓库](https://github.com/Wangjunyu/Tool_Settings)

## 基本概念

 * 管道
 *

## Xargs
https://www.google.com/search?q=xargs&oq=xargs&gs_l=psy-ab.3...1473864.1473864.0.1473967.1.1.0.0.0.0.0.0..0.0....0...1.2.64.psy-ab..1.0.0.xawph4lxqiU


https://gist.github.com/jessicard/3658495

http://blog.csdn.net/my2010sam/article/details/18663053

https://en.wikipedia.org/wiki/Xargs


## Shell Practise


`$ who`
`$ wc` word count
`$ wc -l`only cont lines
`$ who | wc -l`

`$ cat > nusers
who | wc -l`
ctrl + D ( end of file, on mac maybe ctrl + c)

`$ chmod +x nusers
 $ ./nusers`
 change Authoriation and run it