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 may be used
       only 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  ©  2022  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'