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
       deletion.

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  ©  2013  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 8.21                                 March 2016                                              TR(1)