9(1)                                                         9(1)

          9, 9.rc, u, u.rc - run Plan 9 or Unix commands

          9 cmd [ args ...  ]

          . 9 (from sh(1))

          9.rc cmd [ args ...  ]

          . 9.rc (from rc(1))

          u cmd [ args ...  ]

          . u (from sh(1))

          u.rc cmd [ args ...  ]

          . u.rc (from rc(1))

          Because Plan 9 supplies commands with the same name as but
          different behavior than many basic Unix system commands
          (e.g., grep, sed, mkdir, rm), it is not recommended to run
          with the Plan 9 bin directory ahead of the system directo-

          9 is a shell script that sets up a Plan 9 environment and
          runs cmd . It sets $PLAN9 if necessary and adds $PLAN9/bin
          to the beginning of $PATH before running cmd.

          If run with no arguments, 9 does not do anything, so it can
          be invoked from sh-style shells using . 9 in order to make
          the current shell start running in the Plan 9 environment.

          9.rc is the same as 9 but written for use by the shell

          U and u.rc are the inverse of 9 and 9.rc: they move
          $PLAN9/bin to the end of the path.

          Search for greek in the password file:

               $ 9 grep '[α-ζ]' /etc/passwd

          Start an rc(1) with the Plan 9 commands in the path before
          the system commands, and then run the Unix ls:

               $ 9 rc

     9(1)                                                         9(1)

               % u ls