# tr(1)

## NAME

         tr - translate character codes

## SYNOPSIS

         tr [-cds] [string1] [string2]

## OPTIONS

         -c   Complement the set of characters in string1

         -d   Delete all characters specified in string1

         -s   Squeeze all runs of characters in string1 to one character

## EXAMPLES

         tr '[A-Z]' '[a-z]' <x >y
                             # Convert upper case to lower case

         tr -d '0123456789' <f1 >f2
                             # Delete all digits from f1

## DESCRIPTION

         Tr performs simple character translation.  When  no  flag  is  specified,
         each  character  in string1 is mapped onto the corresponding character in
         string2 .