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)