Provided by: coreutils_9.4-3ubuntu6_amd64 bug


       tr - translate or delete characters


       tr [OPTION]... STRING1 [STRING2]


       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

              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

              all characters from CHAR1 to CHAR2 in ascending order

              in ARRAY2, copies of CHAR until length of ARRAY1

              REPEAT copies of CHAR, REPEAT octal if starting with 0

              all letters and digits

              all letters

              all horizontal whitespace

              all control characters

              all digits

              all printable characters, not including space

              all lower case letters

              all printable characters, including space

              all punctuation characters

              all horizontal or vertical whitespace

              all upper case letters

              all hexadecimal digits

              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.


       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.


       Written by Jim Meyering.


       GNU coreutils online help: <>
       Report any translation bugs to <>


       Copyright  ©  2023  Free  Software  Foundation, Inc.  License GPLv3+: GNU GPL version 3 or
       later <>.
       This is free software: you are free to change and redistribute it.  There is NO  WARRANTY,
       to the extent permitted by law.


       Full documentation <>
       or available locally via: info '(coreutils) tr invocation'