Linux Shell脚本之常用参数

Linux Shell脚本之常用参数

1. 常用参数

$#：is a special variable that returns the number of arguments；else, it cant return length of string
$1：is a first argument
$2 ：is a second argument
$n： is a ned argument

• example 1

[root@server4 shells]# string='hello spark'
[root@server4 shells]# echo ${#string}
11