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Annotation of 43BSDTahoe/usr.lib/learn/files/L5.1a, revision 1.1.1.1

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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