1LZIPRECOVER(1)                   User Commands                  LZIPRECOVER(1)
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NAME

6       lziprecover - recovers data from damaged lzip files
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SYNOPSIS

9       lziprecover [options] [files]
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DESCRIPTION

12       Lziprecover  is  a data recovery tool and decompressor for files in the
13       lzip compressed data  format  (.lz).  Lziprecover  is  able  to  repair
14       slightly  damaged  files,  produce  a  correct file by merging the good
15       parts of two or more damaged copies, reproduce a missing (zeroed)  sec‐
16       tor using a reference file, extract data from damaged files, decompress
17       files, and test integrity of files.
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19       Lziprecover can repair perfectly most files with small  errors  (up  to
20       one single-byte error per member), without the need of any extra redun‐
21       dance at all. Losing an entire archive just because of a  corrupt  byte
22       near the beginning is a thing of the past.
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24       Lziprecover  can remove the damaged members from multimember files, for
25       example multimember tar.lz archives.
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27       Lziprecover provides random access to the data in multimember files; it
28       only decompresses the members containing the desired data.
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30       Lziprecover  facilitates  the management of metadata stored as trailing
31       data in lzip files.
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33       Lziprecover is not a replacement for regular backups, but a  last  line
34       of defense for the case where the backups are also damaged.
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OPTIONS

37       -h, --help
38              display this help and exit
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40       -V, --version
41              output version information and exit
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43       -a, --trailing-error
44              exit with error status if trailing data
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46       -A, --alone-to-lz
47              convert lzma-alone files to lzip format
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49       -c, --stdout
50              write to standard output, keep input files
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52       -d, --decompress
53              decompress
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55       -D, --range-decompress=<n-m>
56              decompress a range of bytes to stdout
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58       -e, --reproduce
59              try to reproduce a zeroed sector in file
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61       --lzip-level=N|a|m[N]
62              reproduce one level, all, or match length
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64       --lzip-name=<name>
65              name of lzip executable for --reproduce
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67       --reference-file=<file>
68              reference file for --reproduce
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70       -f, --force
71              overwrite existing output files
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73       -i, --ignore-errors
74              ignore some errors in -d, -D, -l, -t, --dump
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76       -k, --keep
77              keep (don't delete) input files
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79       -l, --list
80              print (un)compressed file sizes
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82       -m, --merge
83              correct errors in file using several copies
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85       -o, --output=<file>
86              place the output into <file>
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88       -q, --quiet
89              suppress all messages
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91       -R, --repair
92              try to repair a small error in file
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94       -s, --split
95              split multimember file in single-member files
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97       -t, --test
98              test compressed file integrity
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100       -v, --verbose
101              be verbose (a 2nd -v gives more)
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103       --loose-trailing
104              allow trailing data seeming corrupt header
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106       --dump=<list>:d:t
107              dump members listed/damaged, tdata to stdout
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109       --remove=<list>:d:t
110              remove members, tdata from files in place
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112       --strip=<list>:d:t
113              copy files to stdout stripping members given
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115       If  no  file  names  are given, or if a file is '-', lziprecover decom‐
116       presses from standard input to standard output.  Numbers  may  be  fol‐
117       lowed  by a multiplier: k = kB = 10^3 = 1000, Ki = KiB = 2^10 = 1024, M
118       = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...
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120       To extract all the files from archive 'foo.tar.lz',  use  the  commands
121       'tar -xf foo.tar.lz' or 'lziprecover -cd foo.tar.lz | tar -xf -'.
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123       Exit  status:  0  for a normal exit, 1 for environmental problems (file
124       not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt  or
125       invalid input file, 3 for an internal consistency error (eg, bug) which
126       caused lziprecover to panic.
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REPORTING BUGS

129       Report bugs to lzip-bug@nongnu.org
130       Lziprecover home page: http://www.nongnu.org/lzip/lziprecover.html
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133       Copyright © 2021 Antonio Diaz Diaz.  License GPLv2+: GNU GPL version  2
134       or later <http://gnu.org/licenses/gpl.html>
135       This  is  free  software:  you  are free to change and redistribute it.
136       There is NO WARRANTY, to the extent permitted by law.
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SEE ALSO

139       The full documentation for lziprecover is maintained as a Texinfo  man‐
140       ual.   If  the  info and lziprecover programs are properly installed at
141       your site, the command
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143              info lziprecover
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145       should give you access to the complete manual.
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149lziprecover 1.22                 January 2021                   LZIPRECOVER(1)
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