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brotli

Name
     brotli - brotli, unbrotli - compress or decompress files

Synopsis
     brotli [OPTION|FILE]...

     unbrotli is equivalent to brotli --decompress

Description
     brotli is a generic-purpose lossless  compression  algorithm
     that compresses data using a combination of a modern variant
     of the LZ77 algorithm, Huffman coding and 2-nd order context
     modeling,  with  a  compression ratio comparable to the best
     currently available general-purpose compression methods.  It
     is  similar  in  speed  with  deflate  but offers more dense
     compression.

     brotli command line syntax similar to gzip (1) and zstd (1).
     Unlike  gzip  (1), source files are preserved by default. It
     is possible to remove them after  processing  by  using  the
     --rm option.

     Arguments that look  like  "--name"  or  "--name=value"  are
     options.  Every  option has a short form "-x" or "-x value".
     Multiple short form options could be coalesced:

     * "--decompress --stdout --suffix=.b" works the same as

     * "-d -s -S .b" and

     * "-dsS .b"


     brotli has 3 operation modes:

     * default mode is compression;

     * --decompress option activates decompression mode;

     * --test option switches to integrity test mode; this option
       is  equivalent  to "--decompress --stdout" except that the
       decompressed data is discarded instead of being written to
       standard output.


     Every non-option argument is a file entry. If no  files  are
     given  or file is "-", brotli reads from standard input. All
     arguments after "--" are file entries.

     Unless --stdout or --output is specified, files are  written
     to  a  new  file  whose name is derived from the source file
     name:
     * when compressing, a  suffix  is  appended  to  the  source
       filename to get the target filename

     * when decompressing, a suffix is removed  from  the  source
       filename to get the target filename


     Default suffix is .br, but it could be specified with --suf-
     fix option.

     Conflicting or duplicate options are not allowed.

Options
     * -#:
         compression level (0-9); bigger values cause denser, but
       slower compression

     * -c, --stdout:
         write on standard output

     * -d, --decompress:
         decompress mode

     * -f, --force:
         force output file overwrite

     * -h, --help:
         display this help and exit

     * -j, --rm:
         remove source file(s); gzip (1)-like behaviour

     * -k, --keep:
         keep source file(s); zstd (1)-like behaviour

     * -n, --no-copy-stat:
         do not copy source file(s) attributes

     * -o FILE, --output=FILE
         output file; valid only if there is a single input entry

     * -q NUM, --quality=NUM:
         compression level (0-11); bigger  values  cause  denser,
       but slower compression

     * -t, --test:
         test file integrity mode

     * -v, --verbose:
         increase output verbosity

     * -w NUM, --lgwin=NUM:

         set LZ77 window size (0, 10-24)  (default:  22);  window
       size is
         (2**NUM - 16); 0 lets compressor decide over the optimal
       value; bigger
         windows size improve density; decoder might  require  up
       to window size
         memory to operate

     * -S SUF, --suffix=SUF:
         output file suffix (default: .br)

     * -V, --version:
         display version and exit

     * -Z, --best:
         use best compression level (default); same as "-q 11"

See Also
     brotli   file   format    is    defined    in    RFC    7932
     https://www.ietf.org/rfc/rfc7932.txt.

     brotli   is   open-sourced    under    the    MIT    License
     https://opensource.org/licenses/MIT.

     Mailing list: https://groups.google.com/forum/#!forum/brotli

Bugs
     Report bugs at: https://github.com/google/brotli/issues
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