TR(1)                                                       TR(1)



     NAME
          tr - translate characters

     SYNOPSIS
          tr [ -cds ] [ string1 [ string2 ] ]

     DESCRIPTION
          tr copies the standard input to the standard output with
          substitution or deletion of selected characters.  Input
          characters found in string1 are mapped into the
          corresponding characters of string2.  Any combination of the
          options -cds may be used:

          -c      Complements the set of characters in string1 with
                  respect to the universe of characters whose ASCII
                  codes are 001 through 377 octal.

          -d      Deletes all input characters in string1.

          -s      Squeezes all strings of repeated output characters
                  that are in string2 to single characters.

          The following abbreviation conventions may be used to
          introduce ranges of characters or repeated characters into
          the strings:

          [a-z]   Stands for the string of characters whose ASCII
                  codes run from character a to character z,
                  inclusive.

          [a*n]   Stands for n repetitions of a.  If the first digit
                  of n is 0, n is considered octal; otherwise, n is
                  taken to be decimal.  A zero or missing n is taken
                  to be huge; this facility is useful for padding
                  string2.

          The escape character \ may be used as in the shell to remove
          special meaning from any character in a string.  In
          addition, \ followed by 1, 2, or 3 octal digits stands for
          the character whose ASCII code is given by those digits.

     EXAMPLE
          The following example creates a list of all the words in
          file1 one per line in file2, where a word is taken to be a
          maximal string of alphabetics.  The strings are quoted to
          protect the special characters from interpretation by the
          shell; 012 is the ASCII code for newline.

                  tr -cs "[A-Z][a-z]" "[\012*]" <file1 >file2

     SEE ALSO
          ed(1), sh(1).



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     TR(1)                                                       TR(1)



          ascii(5) in the Programmer's Reference Manual.

     BUGS
          Will not handle ASCII NUL in string1 or string2; always
          deletes NUL from input.

     ORIGIN
          AT&T V.3















































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