If you long to break free of the constraints of the GUI or think that programming or administering remote machines is in your future, then learning the Unix command ... and C shell. The passwd ...

are primarily command interpreters. This trait has a deep history, stretching all the way to the very first shell and the first UNIX system. Over time, UNIX shells acquired the programming ...

Shell scripting may finally get a proper bug-checker. A group of academics has proposed static analysis techniques aimed at improving the correctness and reliability of Unix shell programs.

Almost every time, the user has a username that exceeds eight characters and I have to suggest that they enter their username after passwd command so that Unix will not be confused. boson> passwd ...