NAME

       plzip - reduces the size of files

SYNOPSIS

       plzip [options] [files]

DESCRIPTION

       Plzip  is a massively parallel (multi-threaded) implementation of lzip, fully compatible with lzip 1.4 or
       newer. Plzip uses the lzlib compression library.

       Lzip is a lossless data compressor with a user interface similar to the one of gzip or  bzip2.  Lzip  can
       compress  about as fast as gzip (lzip -0) or compress most files more than bzip2 (lzip -9). Decompression
       speed is intermediate between gzip and bzip2. Lzip is better than gzip and bzip2  from  a  data  recovery
       perspective.  Lzip has been designed, written and tested with great care to replace gzip and bzip2 as the
       standard general-purpose compressed format for unix-like systems.

       Plzip can compress/decompress large files on multiprocessor machines much faster than lzip, at  the  cost
       of  a slightly reduced compression ratio (0.4 to 2 percent larger compressed files). Note that the number
       of usable threads is limited by file size; on files larger than a  few  GB  plzip  can  use  hundreds  of
       processors, but on files of only a few MB plzip is no faster than lzip.

OPTIONS

       -h, --help
              display this help and exit

       -V, --version
              output version information and exit

       -a, --trailing-error
              exit with error status if trailing data

       -B, --data-size=<bytes>
              set size of input data blocks [2x8=16 MiB]

       -c, --stdout
              write to standard output, keep input files

       -d, --decompress
              decompress

       -f, --force
              overwrite existing output files

       -F, --recompress
              force re-compression of compressed files

       -k, --keep
              keep (don't delete) input files

       -l, --list
              print (un)compressed file sizes

       -m, --match-length=<bytes>
              set match length limit in bytes [36]

       -n, --threads=<n>
              set number of (de)compression threads [2]

       -o, --output=<file>
              if reading standard input, write to <file>

       -q, --quiet
              suppress all messages

       -s, --dictionary-size=<bytes>
              set dictionary size limit in bytes [8 MiB]

       -t, --test
              test compressed file integrity

       -v, --verbose
              be verbose (a 2nd -v gives more)

       -0 .. -9
              set compression level [default 6]

       --fast alias for -0

       --best alias for -9

       --loose-trailing
              allow trailing data seeming corrupt header

       --in-slots=<n>
              number of 1 MiB input packets buffered [4]

       --out-slots=<n>
              number of 1 MiB output packets buffered [64]

       If  no file names are given, or if a file is '-', plzip compresses or decompresses from standard input to
       standard output.  Numbers may be followed by a multiplier: k = kB = 10^3 = 1000, Ki = KiB = 2^10 =  1024,
       M  = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...  Dictionary sizes 12 to 29 are interpreted as powers of
       two, meaning 2^12 to 2^29 bytes.

       The bidimensional parameter space of LZMA can't be mapped to a linear scale optimal  for  all  files.  If
       your  files are large, very repetitive, etc, you may need to use the --dictionary-size and --match-length
       options directly to achieve optimal performance.

       Exit status: 0 for a normal exit, 1 for environmental  problems  (file  not  found,  invalid  flags,  I/O
       errors,  etc),  2  to  indicate a corrupt or invalid input file, 3 for an internal consistency error (eg,
       bug) which caused plzip to panic.

REPORTING BUGS

       Report bugs to lzip-bug@nongnu.org
       Plzip home page: http://www.nongnu.org/lzip/plzip.html

COPYRIGHT

       Copyright © 2009 Laszlo Ersek.
       Copyright © 2019 Antonio Diaz Diaz.  Using lzlib  1.11  License  GPLv2+:  GNU  GPL  version  2  or  later
       <http://gnu.org/licenses/gpl.html>
       This  is  free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent
       permitted by law.

SEE ALSO

       The full documentation for plzip is maintained as a Texinfo manual.  If the info and plzip  programs  are
       properly installed at your site, the command

              info plzip

       should give you access to the complete manual.