xxxxxxxxxx
It is also called as sh-bang, hashbang, poundbang or hash-pling. In Unix-like Operating Systems when a script starting with a she-bang(#!) is executed as a program, the program loader parses the rest of the script’s initial line as a interpreter-directive. In simple words, the she-bang at the head of the script tells the system that this file is a set of commands to be fed to the command interpreter indicated.
/bin/bash is the path to the Bash shell binary on Unix-like operating systems. Bash stands for "Bourne Again SHell" and is a popular command-line interpreter and scripting language for Linux, macOS, and other Unix-like systems.