Ubuntu Manpage: plzip - reduces the size of files

NAME

       plzip - reduces the size of files

SYNOPSIS

       plzip [options] [files]

DESCRIPTION

       Plzip is a massively parallel (multi-threaded) implementation of lzip. Plzip uses the compression library
       lzlib.

       Lzip is a lossless data compressor with a user interface similar to the one of gzip or bzip2. Lzip uses a
       simplified form of LZMA (Lempel-Ziv-Markov chain-Algorithm) designed to achieve complete interoperability
       between implementations. The maximum dictionary size is 512 MiB so that any lzip file can be decompressed
       on  32-bit  machines. Lzip provides accurate and robust 3-factor integrity checking. 'lzip -0' compresses
       about as fast as gzip, while 'lzip -9' compresses most files more  than  bzip2.  Decompression  speed  is
       intermediate between gzip and bzip2. Lzip provides better data recovery capabilities than gzip and bzip2.
       Lzip  has been designed, written, and tested with great care to replace gzip and bzip2 as 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 smaller than 1 MiB plzip is no faster than lzip (not even at compression level
       -0).  The number of threads defaults to the number of processors.

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, test compressed file integrity

       -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>
              write to <file>, keep input files

       -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]

       --check-lib
              compare version of lzlib.h with liblz.{a,so}

       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  options  --dictionary-size  and
       --match-length directly to achieve optimal performance.

       To  extract  all the files from archive 'foo.tar.lz', use the commands 'tar -xf foo.tar.lz' or 'plzip -cd
       foo.tar.lz | tar -xf -'.

       Exit status: 0 for a normal exit, 1 for environmental problems  (file  not  found,  invalid  command-line
       options,  I/O  errors, etc), 2 to indicate a corrupt or invalid input file, 3 for an internal consistency
       error (e.g., 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   ©   2025   Antonio   Diaz   Diaz.    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.  Using lzlib 1.15 Using LZ_API_VERSION = 1015

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

REPORTING BUGS

COPYRIGHT

SEE ALSO