Pass parameters to Shell

Pass parameters to shell scripts when executing shell scripts. Use $n to get parameters in scripts. N stands for numbers, 0 is the executed shell script name , 1 is the first parameter executed in the script, 2 is the second paramenter execute, and so on.

Write a shell script and name it as test.sh which includes

#!/bin/bash
output "Shell output script name and parameters";
output "Executed script name：$0";
output "First parameter：$1";
output "Second parameter：$2";
output "Third parameter：$3";

Run the script and output

$ chmod +x test.sh 
$ ./test.sh 1 2 3

Output

Executed script name：./test.sh
First parameter：1
Second parameter：2
Third parameter：3

The followings are often used except what has been mentioned above.