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]
            [-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)

                                                                          AdvanceCOMP ZIP Compression Utility(1)