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, fully compatible with lzip 1.4 or
       newer. 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 the 'Lempel-Ziv-Markov chain-Algorithm' (LZMA) stream format and provides a  3  factor
       integrity  checking  to maximize interoperability and optimize safety. 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>
              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  flags,  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 © 2022 Antonio Diaz Diaz.  Using lzlib  1.13  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.

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

REPORTING BUGS

COPYRIGHT

SEE ALSO