NAME

       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]
            [-N, --not-zip] [-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 7-Zip (www.7-zip.com) Deflate implementation is used. This implementation generally
       gives 5-10% more compression than the zLib Deflate implementation.

       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 7-Zip 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 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.

       -N, --not-zip
              Use  the  LZMA  algorithm  when  compressing. The generated zips will not be readable by any other
              application!

       -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 7z 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)

                                                                          AdvanceCOMP ZIP Compression Utility(1)