LZIPRECOVER

Section: User Commands (1)
Updated: January 2021
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NAME

lziprecover - recovers data from damaged lzip files  

SYNOPSIS

lziprecover [,options/] [,files/]  

DESCRIPTION

Lziprecover is a data recovery tool and decompressor for files in the lzip compressed data format (.lz). Lziprecover is able to repair slightly damaged files, produce a correct file by merging the good parts of two or more damaged copies, reproduce a missing (zeroed) sector using a reference file, extract data from damaged files, decompress files, and test integrity of files.

Lziprecover can repair perfectly most files with small errors (up to one single-byte error per member), without the need of any extra redundance at all. Losing an entire archive just because of a corrupt byte near the beginning is a thing of the past.

Lziprecover can remove the damaged members from multimember files, for example multimember tar.lz archives.

Lziprecover provides random access to the data in multimember files; it only decompresses the members containing the desired data.

Lziprecover facilitates the management of metadata stored as trailing data in lzip files.

Lziprecover is not a replacement for regular backups, but a last line of defense for the case where the backups are also damaged.  

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
-A, --alone-to-lz
convert lzma-alone files to lzip format
-c, --stdout
write to standard output, keep input files
-d, --decompress
decompress
-D, --range-decompress=<n-m>
decompress a range of bytes to stdout
-e, --reproduce
try to reproduce a zeroed sector in file
--lzip-level=,N/|a|m[N]
reproduce one level, all, or match length
--lzip-name=<name>
name of lzip executable for --reproduce
--reference-file=<file>
reference file for --reproduce
-f, --force
overwrite existing output files
-i, --ignore-errors
ignore some errors in -d, -D, -l, -t, --dump
-k, --keep
keep (don't delete) input files
-l, --list
print (un)compressed file sizes
-m, --merge
correct errors in file using several copies
-o, --output=<file>
place the output into <file>
-q, --quiet
suppress all messages
-R, --repair
try to repair a small error in file
-s, --split
split multimember file in single-member files
-t, --test
test compressed file integrity
-v, --verbose
be verbose (a 2nd -v gives more)
--loose-trailing
allow trailing data seeming corrupt header
--dump=<list>:d:t
dump members listed/damaged, tdata to stdout
--remove=<list>:d:t
remove members, tdata from files in place
--strip=<list>:d:t
copy files to stdout stripping members given

If no file names are given, or if a file is '-', lziprecover 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...

To extract all the files from archive 'foo.tar.lz', use the commands 'tar -xf foo.tar.lz' or 'lziprecover -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 (eg, bug) which caused lziprecover to panic.  

REPORTING BUGS

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

COPYRIGHT

Copyright © 2021 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.  

SEE ALSO

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

should give you access to the complete manual.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
REPORTING BUGS
COPYRIGHT
SEE ALSO