The shebang works by specifying the path to the interpreter that should be used to execute the script. When you run a script from the command line, the operating system reads the first line of the script. If it starts with #!, it uses the specified interpreter to run the script.
Here's how it works step-by-step:
- Script Execution: When you execute a script, the operating system checks the first line.
- Interpreter Path: If the first line begins with
#!, the OS uses the path that follows to locate the interpreter. - Execution: The OS then invokes the specified interpreter, passing the script as an argument to it.
For example, if your script starts with #!/bin/bash, the OS will use the Bash shell to execute the script. If the shebang is omitted, the script may be executed using the default shell, which might not be the intended interpreter.
