NAME

       tr - translate or delete characters

SYNOPSIS

       tr [OPTION]... STRING1 [STRING2]

DESCRIPTION

       Translate,  squeeze,  and/or  delete  characters  from standard input, writing to standard
       output.  STRING1 and STRING2 specify arrays of characters ARRAY1 and ARRAY2  that  control
       the action.

       -c, -C, --complement
              use the complement of ARRAY1

       -d, --delete
              delete characters in ARRAY1, do not translate

       -s, --squeeze-repeats
              replace  each sequence of a repeated character that is listed in the last specified
              ARRAY, with a single occurrence of that character

       -t, --truncate-set1
              first truncate ARRAY1 to length of ARRAY2

       --help display this help and exit

       --version
              output version information and exit

       ARRAYs 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 ARRAY2, copies of CHAR until length of ARRAY1

       [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 STRING1 and STRING2 appear.  -t is only
       significant when translating.  ARRAY2 is extended to length of  ARRAY1  by  repeating  its
       last  character as necessary.  Excess characters of ARRAY2 are ignored.  Character classes
       expand in unspecified order; while translating, [:lower:] and [:upper:]  may  be  used  in
       pairs to specify case conversion.  Squeezing occurs after translation or deletion.

BUGS

       Full support is available only for safe single-byte locales, in which every possible input
       byte represents a single character.  The C locale is safe in GNU systems, so you can avoid
       this issue in the shell by running LC_ALL=C tr instead of plain tr.

AUTHOR

       Written by Jim Meyering.

REPORTING BUGS

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

COPYRIGHT

       Copyright  ©  2023  Free  Software  Foundation, Inc.  License GPLv3+: GNU GPL version 3 or
       later <https://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

       Full documentation <https://www.gnu.org/software/coreutils/tr>
       or available locally via: info '(coreutils) tr invocation'