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Annotation of 42BSD/usr.lib/learn/files/L4.3a, revision 1.1

1.1     ! root        1: #print
        !             2: You can use the "ls" command to ask whether
        !             3: a single file exists without listing the entire
        !             4: directory.  For example, "ls george" will list
        !             5: "george" if there is a file with that name, and
        !             6: complain if there is not one.  This directory
        !             7: contains a file named "arthur" but no file named
        !             8: "alan".  You can verify that by typing the
        !             9: ordinary "ls" command.  Then try typing "ls arthur"
        !            10: to see what happens, and follow that by "ls alan".
        !            11: Then type "ready".
        !            12: #create arthur
        !            13: xxx
        !            14: #copyin
        !            15: #user
        !            16: #uncopyin
        !            17: grep 'ls arthur' .copy >/dev/null || grep 'ls alan' .copy >/dev/null
        !            18: #log
        !            19: #next
        !            20: 4.3b 0

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