脚本语言Bash简明教程

Posted 2022-12-28 白马负金羁

Bash（GNU Bourne-Again Shell）is a Unix shell and script language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. First released in 1989, it has been used as the default login shell for most Linux distributions.

一、使用函数

1. 声明/定义

• Single line version

function_name ()  commands; 

• Multi-line version

方法1：使用小括号

function_name () 
    commands

方法2：使用关键字function

function function_name 
    commands

2. 函数调用

直接使用函数名 function_name

特别地，Local variables are declared within the function body with the “local” keyword. It is visible only inside the function. 除此之外，其它变量 are global variables.

例如：

va