... symbolic link to another shell. For instance, on most GNU /Linux sys-tems, /bin/sh points to bash (the Bourne-Again SHell), and different GNU /Linux distributions use different versions of bash. ... some indication of the nature of the error. It’s a good idea to stick with this con-vention in your programs because other components of the GNU /Linux systemassume this behavior. For instance, ... in Chapter 5,“Interprocess Communication,” but fortunately Linux does this for you, using signals.When a child process terminates, Linux sends the parent process the SIGCHLD signal.The default...