A shebang, also known as a hashbang or a sharpbang, is a special sequence of characters at the beginning of a script that specifies the path to the interpreter that should be used to execute the script.
In Linux and Unix-like operating systems, a shebang is composed of two characters: the hash sign “#” and the exclamation mark “!”, followed by the path to the interpreter.
Here is an example of a shebang in a Bash script:
In this example, the shebang specifies that the Bash interpreter should be used to execute the script. The path to the Bash interpreter is “/bin/bash”, which is commonly used on Linux and Unix-like systems.
The shebang must be the first line of the script, and it tells the operating system which interpreter to use when executing the script. Without a shebang, the operating system may not know how to execute the script, or it may use a default interpreter, which may not be the one intended by the script author.