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 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 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  dele‐
       tion.

AUTHOR
       Written by Jim Meyering.

REPORTING BUGS
       Report tr bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report tr translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright  © 2011 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 command

              info coreutils 'tr invocation'

       should give you access to the complete manual.



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