tr(1)            (Directory and File Management Utilities)            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.

   SEE ALSO
         ed(1), sh(1).
         ascii(5) in the System Administrator's Reference Manual.

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









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