Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
LZIP(1)				 User Commands			       LZIP(1)

       lzip - reduces the size of files

       lzip [options] [files]

       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	 'Lem-
       pel-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 intermedi-
       ate  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-pur-
       pose compressed format for unix-like systems.

       -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, --member-size=<bytes>
	      set member size limit in bytes

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

       -d, --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]

       -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]

       -S, --volume-size=<bytes>
	      set volume size limit in bytes

       -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

	      allow trailing data seeming corrupt header

       If no file names	are given, or if a file	is '-',	lzip compresses	or de-
       compresses from standard	input to standard output.  Numbers may be fol-
       lowed 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 'lzip -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 lzip to panic.

       The  ideas embodied in lzip are due to (at least) the following people:
       Abraham Lempel and Jacob	Ziv (for the LZ	algorithm), Andrey Markov (for
       the  definition of Markov chains), G.N.N. Martin	(for the definition of
       range encoding),	Igor Pavlov (for putting all  the  above  together  in
       LZMA), and Julian Seward	(for bzip2's CLI).

       Report bugs to
       Lzip home page:

       Copyright  (C) 2022 Antonio Diaz	Diaz.  License GPLv2+: GNU GPL version
       2 or later <>
       This is free software: you are free  to	change	and  redistribute  it.
       There is	NO WARRANTY, to	the extent permitted by	law.

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

	      info lzip

       should give you access to the complete manual.

lzip 1.23			 January 2022			       LZIP(1)


Want to link to this manual page? Use this URL:

home | help