Name{number}
	advzip - AdvanceCOMP ZIP Compression Utility

Synopsis
	:advzip [-a, --add] [-x, --extract] [-l, --list]
	:	[-z, --recompress] [-t, --test] [-0, --shrink-store]
	:	[-1, --shrink-fast] [-2, --shrink-normal] [-3, --shrink-extra]
	:	[-4, --shrink-insane] [-i, --iter N]
	:	[-k, --keep-file-time] [-p, --pedantic] [-q, --quiet]
	:	[-h, --help] [-V, --version] ARCHIVES... [FILES...]

Description
	The main purpose of this utility is to recompress and test
	the zip archives to get the smallest possible size.

	For recompression the libdeflate implementation is used.
	This implementation generally gives 5-10% more compression
	than the zLib Deflate implementation, and it's also
	generally faster.

	For experimental purpose also the 7-Zip LZMA algorithm is
	available with the -N option. In this case, the generated
	zips WILL NOT BE USABLE by any other program. To make
	them usable you need to recompress them without the -N
	option. Generally this algorithm gives 10-20% more
	compression than the zLib Deflate implementation.

Options
	-a, --add ARCHIVE FILES...
		Create the specified archive with the specified
		files. You must specify only one archive.

	-x, --extract ARCHIVE
		Extract all the files on the specified archive. You
		must specify only one archive.

	-l, --list ARCHIVES...
		List the content of the specified archives.

	-z, --recompress ARCHIVES...
		Recompress the specified archives. If the -1, -2,
		-3, -4 options are specified, it's used the smallest file
		choice from: the previous compressed data, the new
		compression and the uncompressed format. If the -0
		option is specified the archive is always rewritten
		without any compression.

	-t, --test ARCHIVES...
		Test the specified archives. The tests may be
		extended with the -p option.

	-k, --keep-file-time
		When recompressing with -z keep the .zip file time.

	-p, --pedantic
		Be pedantic on the zip tests. If this flag is
		enabled some more extensive tests on the zip
		integrity are done. These tests are generally not
		done by other zip utilities.

	-0, --shrink-store
		Disable the compression. The file is
		only stored and not compressed. This option is
		very useful to expand the archives of .png and .mp3
		files. These files are already compressed, trying to
		compress them another time is really a waste of time
		and resource.

	-1, --shrink-fast
		Set the compression level to "fast" using the zlib
		compressor.

	-2, --shrink-normal
		Set the compression level to "normal" using the libdeflate
		compressor.
		This is the default level of compression.

	-3, --shrink-extra
		Set the compression level to "extra" using the 7z
		compressor.
		You can define the compressor iterations with
		the -i, --iter option.

	-4, --shrink-insane
		Set the compression level to "insane" using the zopfli
		compressor.
		You can define the compressor iterations with
		the -i, --iter option.

	-i, --iter N
		Define an additional numer of iterations for the 7z and zopfli
		compressors for modes -3 and -4.
		More iterations usually give a better compression, but may
		require a lot more time.
		Try for example with 10, 15, 20, and so on.

Copyright
	This file is Copyright (C) 2002 Andrea Mazzoleni, Filipe Estima

See Also
	advpng(1), advmng(1), advdef(1)
