TR(1)							   User Commands						     TR(1)



NAME
       tr - translate or delete characters

SYNOPSIS
       tr [OPTION]... SET1 [SET2]

DESCRIPTION
       Translate, squeeze, and/or delete characters from standard input, writing to standard output.

       -c, -C, --complement
	      use the complement of SET1

       -d, --delete
	      delete characters in SET1, do not translate

       -s, --squeeze-repeats
	      replace  each input sequence of a repeated character that is listed in SET1 with a single occurrence of that charac‐
	      ter

       -t, --truncate-set1
	      first truncate SET1 to length of SET2

       --help display this help and exit

       --version
	      output version information and exit

       SETs are specified as strings of characters.  Most represent themselves.  Interpreted sequences are:

       \NNN   character with octal value NNN (1 to 3 octal digits)

       \\     backslash

       \a     audible BEL

       \b     backspace

       \f     form feed

       \n     new line

       \r     return

       \t     horizontal tab

       \v     vertical tab

       CHAR1-CHAR2
	      all characters from CHAR1 to CHAR2 in ascending order

       [CHAR*]
	      in SET2, copies of CHAR until length of SET1

       [CHAR*REPEAT]
	      REPEAT copies of CHAR, REPEAT octal if starting with 0

       [:alnum:]
	      all letters and digits

       [:alpha:]
	      all letters

       [:blank:]
	      all horizontal whitespace

       [:cntrl:]
	      all control characters

       [:digit:]
	      all digits

       [:graph:]
	      all printable characters, not including space

       [:lower:]
	      all lower case letters

       [:print:]
	      all printable characters, including space

       [:punct:]
	      all punctuation characters

       [:space:]
	      all horizontal or vertical whitespace

       [:upper:]
	      all upper case letters

       [:xdigit:]
	      all hexadecimal digits

       [=CHAR=]
	      all characters which are equivalent to CHAR

       Translation occurs if -d is not given and both SET1 and SET2 appear.  -t may  be  used  only  when  translating.   SET2	is
       extended  to  length  of  SET1  by repeating its last character as necessary.  Excess characters of SET2 are ignored.  Only
       [:lower:] and [:upper:] are guaranteed to expand in ascending order; used in SET2 while translating, they may only be  used
       in  pairs  to  specify  case conversion.  -s uses SET1 if not translating nor deleting; else squeezing uses SET2 and occurs
       after translation or deletion.

AUTHOR
       Written by Jim Meyering.

REPORTING BUGS
       Report tr bugs to bug-coreutils@gnu.org
       GNU coreutils home page: 
       General help using GNU software: 
       Report tr translation bugs to 

COPYRIGHT
       Copyright   ©   2011   Free   Software	Foundation,   Inc.    License	GPLv3+:   GNU	GPL    version	  3    or    later
       .
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       The  full  documentation  for  tr is maintained as a Texinfo manual.  If the info and tr programs are properly installed at
       your site, the command

	      info coreutils 'tr invocation'

       should give you access to the complete manual.



GNU coreutils 8.12.197-032bb				  September 2011						     TR(1)