From my first experience creating a shell script, I learned about the shebang (#!), the special first line used to specify the interpreter for executing the script: #! /usr/bin/sh echo "Hello, World!" So that you can just invoke it with ./hello.sh and it will run with the specified interpreter, assuming the file has execute permissions. Of course, the shebang isn’t limited to shell scripts; you can use it for any script type: #! /usr/bin/python3 print("Hello, World!") This is particularly useful...