Meanings of variables $ #, $ @, $0, $1, $2 in Linux

Let's first write a simple script and then explain the meaning of each variable. # Touch variable # Vi variable The script content is as follows: #! /Bin/sh Echo "number: $ #"
Echo "scname: $0"
Echo "First: $1"
Echo "Second: $2"
Echo "argume: $ @"
Save and exit Grant the script execution permission # Chmod + x variable Execute scripts #./Variable AA bb Number: 2
Scname:./variable
First: AA
Second: bb
Argume: AA bb The displayed result shows: $ # Indicates the number of parameters passed to the script.

$0 is the script name.

$1 is the first parameter passed to the shell script.

$2 is the second parameter passed to the shell script.

$ @ Is a list of all parameters passed to the script.