NAME    [Toc]    [Back]

       tr - translate or delete characters

SYNOPSIS    [Toc]    [Back]

       tr [OPTION]... SET1 [SET2]

DESCRIPTION    [Toc]    [Back]

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

       -c, --complement
	      first complement SET1

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

       -s, --squeeze-repeats
	      replace sequence of characters with one

       -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

       [CHAR1-CHAR2]
	      same as CHAR1-CHAR2, if both SET1 and SET2 use this

       [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    [Toc]    [Back]

       Written by Jim Meyering.

REPORTING BUGS    [Toc]    [Back]

       Report bugs to <bug-textutils@gnu.org>.

COPYRIGHT    [Toc]    [Back]

       Copyright (C) 1999 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is
       NO  warranty;  not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.

SEE ALSO    [Toc]    [Back]

       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 tr

       should give you access to the complete manual.



GNU textutils 2.0		   July 2001				 TR(1)