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PDLZIP(1) User Commands PDLZIP(1)

NAME

pdlzip - reduces the size of files

SYNOPSIS

pdlzip [options] [files]

DESCRIPTION

Pdlzip - A permissively licensed implementation of the lzip data compressor also able to decompress legacy lzma-alone (.lzma) files.

Lzma-alone is a very bad format; it is essentially a raw LZMA stream. If you keep any lzma-alone files, it is advisable to recompress them to lzip format. Lziprecover can convert some lzma-alone files to lzip format without recompressing.

OPTIONS

display this help and exit
output version information and exit
exit with error status if trailing data
write to standard output, keep input files
decompress
overwrite existing output files
force re-compression of compressed files
keep (don't delete) input files
set match length limit in bytes [36]
if reading standard input, write to <file>
suppress all messages
set dictionary size limit in bytes [8 MiB]
test compressed file integrity
be verbose (a 2nd -v gives more)
-1 .. -9
set compression level [default 6]
alias for -1
alias for -9

If no file names are given, or if a file is '-', pdlzip 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 27 are interpreted as powers of two, meaning 2^12 to 2^27 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. For example, -9m64 usually compresses executables more (and faster) than -9.

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 pdlzip to panic.

REPORTING BUGS

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

COPYRIGHT

Copyright © 2017 Antonio Diaz Diaz. Public Domain 2009 Igor Pavlov. License 2-clause BSD.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

April 2017 pdlzip 1.8