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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 (runes).  Input characters found  in
       string1  are mapped into the corresponding characters of string2.  When
       string2 is short it is padded to the length of string1  by  duplicating
       its last character.  Any combination of the options -cds may be used:

       -c     Complement  string1: replace it with a lexicographically ordered
              list of all other characters.

       -d     Delete from input all characters in string1.

       -s     Squeeze repeated output characters  that  occur  in  string2  to
              single characters.

       In  either  string  a  noninitial sequence -x, where x is any character
       (possibly quoted), stands for a range of characters: a  possibly  empty
       sequence  of  codes  running from the successor of the previous code up
       through the code for x.  The character followed by  1,  2  or  3  octal
       digits  stands  for  the character whose 16-bit value is given by those
       digits.  The character sequence followed by 1, 2, 3, or  4  hexadecimal
       digits  stands  for  the character whose 16-bit value is given by those
       digits.  A followed by any other character stands for that character.

EXAMPLES

       Replace all upper-case ASCII letters by lower-case.

              tr A-Z a-z <mixed >lower

       Create a list of all the words in one per line in where a word is taken
       to  be  a  maximal string of alphabetics.  String2 is given as a quoted
       newline.

              tr -cs A-Za-z ’ ’ <file1 >file2

SOURCE

       /src/cmd/tr.c

SEE ALSO

       sed(1)

                                                                         TR(1)