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Bash - how to use command line arguments in script

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Created by:
martineau
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This article will show you how to use command-line arguments in your script in Bash.

In Bash, we can use arguments that were passed as parameters of our script. We can refer to them using "$1" (first parameter), "$2" (second argument), "$3" (third argument), etc.

 

Practical example

Example my_script.sh file:

#!/bin/bash

echo "$1"
echo "$2"
echo "$3"

Run in command line:

./my_script.sh one two three

Output:

one
two
three

Go through all given arguments

Example my_script.sh file:

#!/bin/bash

for parameter in "$@" 
do
    echo "$parameter"
done

Run in command line:

./my_script.sh one two three four

Output: 

one
two
three
four

 

Alternative titles

  1. Bash - pass argument as variable to script file
  2. Bash - pass argument as variable into script.sh file
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Bash - how to use command line arguments in script
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