Linux Bash

UNIX和Linux用户通过命令行提示符与系统连接。这些命令由命令行解释器解释，称为shell。

Common shells available on Mac OS/X:

• sh (Bourne shell, the first Unix shell), also on centos.
• csh (C shell, following C syntax), also on centos.
• tcsh (a newer version of csh), also on centos.
• ksh (Korn shell, a combination of sh and csh).
• bash (Bourne again shell, compatible with sh, but improved), also on centos.
• zsh (Z shell, backward compatible with bash).

本章将聚焦于centos linux 上的 bash。