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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 stan-
       dard 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.  Inter-
       preted 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 AT 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 (C) 2010 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 8.4                 March 2017                             TR(1)

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