svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
brotli(1)
BROTLI(1) User commands BROTLI(1)
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 com‐
presses data using a combination of a modern variant of the LZ77 algo‐
rithm, Huffman coding and 2-nd order context modeling, with a compres‐
sion 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 equiva‐
lent 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 --suffix 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://open‐
source.org/licenses/MIT.
Mailing list: https://groups.google.com/forum/#!forum/brotli
BUGS
Report bugs at: https://github.com/google/brotli/issues
brotli 1.0.0 February 2018 BROTLI(1)