Everything is a File in Linux / Unix Operating System. There are Three types of File types in Linux / Unix. Linux follows parent-child relationships.
Shell, is the “Sleeping Beauty” of Linux. echo hello world and echo “hello world”, both are different. The space seems to be a special one, and the action taken by the watchdog.
The kernel, in traditional parlance, is often called the Operating System. The Shell, on the other hand, is the “Sleeping Beauty” of Linux.