shell提供了对UNIX系统的接口。收集输入,并根据输入执行程序。当一个程序执行完毕后,它会显示该程序的输出。

 

shell是一个环境,我们可以运行我们的命令,程序和shell脚本。shell有不同的风格,就像有不同风格的操作系统。每个的shell的风格,有它自己的一套识别的命令和功能。
shell它交互式解释和执行用户输入的命令或者自动地解释和执行预先设定好的一连串的命令;作为程序设计语言,它定义了各种变量和参数,并提供了许多在高级语言中才具有的控制结构,包括循环和分支。

几个学习Shell编程的网站推荐:

Ubuntu社区:http://wiki.ubuntu.org.cn/Shell%E7%BC%96%E7%A8%8B%E5%9F%BA%E7%A1%80
易百教程 http://www.yiibai.com/shell/
Chinaunix: http://bbs.chinaunix.net/forum-24-1.html


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