Linux_shell_ Passing parameters

Parameters can be passed when executing a shell script:

The format of the script get parameter is: $ $ ... Where $ $ is the first argument passed and the one that is accepted is./test.sh this thing.

Code: Example:

#!/bin/"" $0"2--" $1   "3--" $2 

Operation Result:

Note: You can see that I passed two parameters 11 22 when I was running, but when I received it, it was./test.sh the true parameters are received.

There are also several special characters for handling parameters:

$ #用例:

"  the "$0"2--"$1"3-- "$2"------"$#

Operation Result:

You can see the value of the last line output 2 is the number of parameters

$* use case:

"  the "$0"2--"$1"3-- "$2"------"$*

Operation Result:

The "11 22" from which the output is seen is a single string.

[email protected] and $* usage, the difference is that the former is to separate each parameter, and the latter is to treat all parameters as a single string

Linux_shell_ passing parameters