Shell command-line arguments

1, $* and [email protected] Difference

Cat a.sh

#!/bin/bash

For i in $* #这里换成 [email protected] same result

Do

Echo $i

Done

SH a.sh 1 ' 2 3 '

1

2

3

VI a.sh

For i in "$*"

...

SH a.sh 1 ' 2 3 '

1 2 3

VI a.sh

For i in "[email protected]"

...

SH a.sh 1 ' 2 3 '

1

2 3

Conclusion: no double quotes $* and [email protected] results, add double quotation marks, "$*" to all command line arguments as a string processing, "[email protected]" will enclose the quoted character as a string processing such as (' 2 3 ')

Shell command-line arguments