But does'nt the shell "wait" for whatever command is given to it to complete???....little confused here.
It does. Running "man" with no parameters causes a single line of text to be printed, and man exits immediately after. As the shell has been replaced by man, and man exits instantly, then you lose your shell.
$ exec exit bash: exec: exit: not found
did not work! is'nt "exit" also a command?
$ type exit exit is a shell builtin
Daniel
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