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Annotation of 43BSDTahoe/usr.lib/learn/files/L5.1a, revision 1.1

1.1     ! root        1: #print
        !             2: Most UNIX commands, like "ls" and "cat", let you
        !             3: specify any number of file names after the command.
        !             4: To make this as easy as possible, there are some
        !             5: ways to abbreviate file names.  This is usually
        !             6: faster and more accurate than typing out the list in full.
        !             7: 
        !             8: For example, when the character "?" is used in a file name,
        !             9: it will represent any character that might be
        !            10: in a file name.  That is, the name "a?" is
        !            11: an abbreviation for the files "a1", "a2", "aa",
        !            12: and so forth.  You can say
        !            13:   ls a?
        !            14: and if there are any file names beginning with
        !            15: "a" that are exactly two letters long, the computer
        !            16: will tell you their names.  Try that here.
        !            17: First list all the file names with "ls"; then type
        !            18:   ls a?
        !            19: to get all the two letter names beginning with "a".
        !            20: Then type "ready".
        !            21: #create a1
        !            22: #create a12
        !            23: #create abcdef
        !            24: #create ax
        !            25: #create aa
        !            26: #copyin
        !            27: #user
        !            28: #uncopyin
        !            29: grep '^ls a?$' .copy >/dev/null
        !            30: #log
        !            31: #next
        !            32: 5.1b 0
        !            33: 5.1c 5
        !            34: 5.1e 10

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