lziprecover - recovers data from damaged lzip files
lziprecover [options] [files]
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.
- -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
- -D, --range-decompress=<n-m>
- decompress a range of bytes to stdout
- -e, --reproduce
- try to reproduce a zeroed sector in file
- reproduce one level, all, or match length
- name of lzip executable for --reproduce
- 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)
- allow trailing data seeming corrupt header
- dump members listed/damaged, tdata to stdout
- remove members, tdata from files in place
- 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.
Report bugs to firstname.lastname@example.org
Lziprecover home page: http://www.nongnu.org/lzip/lziprecover.html
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.
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.
|January 2021||lziprecover 1.22|