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lunzip(1)

LUNZIP(1)                        User Commands                       LUNZIP(1)

NAME
       lunzip - decompressor for the lzip format

SYNOPSIS
       lunzip [options] [files]

DESCRIPTION
       Lunzip  is  a  decompressor for the lzip format. It is written in C and
       its small size makes it well suited for embedded  devices  or  software
       installers that need to decompress files but don't need compression ca‐
       pabilities. Lunzip is fully compatible with lzip-1.4 or newer.

       Lunzip  provides  a 'low memory' mode able to decompress any file using
       as little memory as 50 kB, irrespective of the dictionary size used  to
       compress  the  file.  To  activate  it,  specify the size of the output
       buffer with the '--buffer-size' option and lunzip will use  the  decom‐
       pressed  file  as  dictionary  for distances beyond the buffer size. Of
       course, the smaller the buffer size used in relation to the  dictionary
       size,  the  more  accesses to disk are needed and the slower the decom‐
       pression is.  This 'low memory' mode only works when decompressing to a
       regular file and is intended for systems without enough memory  (RAM  +
       swap) to keep the whole dictionary at once.

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

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

       -d, --decompress
              decompress (this is the default)

       -f, --force
              overwrite existing output files

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

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

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

       -q, --quiet
              suppress all messages

       -t, --test
              test compressed file integrity

       -u, --buffer-size=<bytes>
              set output buffer size in bytes

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

       If  no  file  names are given, or if a file is '-', lunzip 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...  Buffer sizes 12 to 29  are  inter‐
       preted as powers of two, meaning 2^12 to 2^29 bytes.

       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 lunzip to panic.

REPORTING BUGS
       Report bugs to lzip-bug@nongnu.org
       Lunzip home page: http://www.nongnu.org/lzip/lunzip.html

COPYRIGHT
       Copyright  © 2017 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.

lunzip 1.9                        April 2017                         LUNZIP(1)
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