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(1plan9)