... IDs Each process in a Linux system is identified by its unique process ID, sometimes referred to as pid Process IDs are 16-bit numbers that are assigned sequentially by Linux as new processes ... symbolic link to another shell For instance, on most GNU /Linux systems, /bin/sh points to bash (the Bourne-Again SHell), and different GNU /Linux distributions use different versions of bash Invoking ... to run and create a new process instance of that program Linux doesn’t contain a single function that does all this in one step Instead, Linux provides one function, fork, that makes a child process...