What is the purpose of shebang?

The shebang (#!) is a special character sequence at the beginning of a script file that indicates which interpreter should be used to execute the script.

Purpose:

1. Interpreter Specification: It tells the operating system which interpreter to use (e.g., Bash, Python) to run the script. For example, #!/bin/bash specifies that the script should be executed using the Bash shell.

2. Portability: It allows scripts to be run on different systems without needing to specify the interpreter explicitly each time.

3. Execution: When you run a script directly (e.g., ./script.sh), the system checks the shebang to determine how to execute it.

Example:

#!/bin/bash
echo "Hello, World!"

In this example, the script will be executed using the Bash shell.

Using the shebang is a best practice for scripting, ensuring that your script runs in the intended environment.