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, writ-
       ing to standard output.

       -c, -C, --complement
	      first complement 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 character

       -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 them-
       selves.	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 bugs to <bug-coreutils@gnu.org>.

COPYRIGHT
       Copyright  (C) 2008 Free Software Foundation, Inc.  License GPLv3+: GNU
       GPL version 3 or later <http://gnu.org/licenses/gpl.html>
       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  com-
       mand

	      info coreutils 'tr invocation'

       should give you access to the complete manual.



GNU coreutils 6.10		  April 2008				 TR(1)