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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 sequence of a repeated character that is listed  in
          the  last  specified  SET,  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

   
     audible BEL

   	     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  the  last
   specified SET, and occurs after translation or deletion.

AUTHOR

   Written by Jim Meyering.

REPORTING BUGS

   GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
   Report tr translation bugs to <http://translationproject.org/team/>

COPYRIGHT

   Copyright    2016  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.

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