On second thought, what is probably happening is that when you replace your shell with "fchello" or "ls", the program runs and then exits. After it exits, the terminal window quits because it thinks you are done. "Exec" is probably not what you want. ;-)
On second thought, what is probably happening is that when you replace your shell with "fchello" or "ls", the program runs and then exits. After it exits, the terminal window quits because it thinks you are done. "Exec" is probably not what you want. ;-)