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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 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  trans-
       lating,  they may only be used in pairs to specify case conversion.  -s uses SET1 if not translating nor delet-
       ing; else squeezing uses SET2 and occurs after translation or deletion.

AUTHOR
       Written by Jim Meyering.

REPORTING BUGS
       Report tr bugs to bug-coreutilsATgnu.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 permit-
       ted 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)