TR(1)                INTERACTIVE UNIX System                TR(1)



          NAME
               tr - translate characters

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

          DESCRIPTION
               The tr command 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 intro-
               duce 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 addi-
               tion, \ 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 new-line.

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

          SEE ALSO
               ed(1), sh(1).
               ascii(5) in the INTERACTIVE SDS Guide and Programmer's


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          TR(1)                INTERACTIVE UNIX System                TR(1)



               Reference Manual.

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


















































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