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P. 131

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            •
                                  •
                          •
   Unix
                                                                                                               The
   Case
                                  The
                          Uses
            Parsing
   Study—
                                  shell
                                                                                                               Shell
                          path

            stage
                          (=
                                  just
   Processes
                   Conventionally
                                  a
                          list
                   ‘&’
                          of

                                  process
            (omitted)
                                                                                         ad
                   specifies
                                                                                            repeat
                                  like
            can
                                                                                      infinitum
                          directories
                   run
            do
                                                             no
                          to
                   in
            lots.
                                                            fg?
                                               wait
                                                                                   read
                                                                     fork
            .
                                                                                                 write
                                                       yes
                                  everything
            .
                          search)
                                  else.
                          for
                                                                       child
                                                                     process
                   background.
                                                 zombie
                                               process
                                                                                                 issue prompt
                                                                                   get command line
                                                exit
                                                          executes
                                                                      execve
                                                             program
                          convenience.























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