Section: User Commands (1)
Updated: February 2018
Page Index


lziprecover - recovers data from damaged lzip files  


lziprecover [,options/] [,files/]  


Lziprecover - Data recovery tool and decompressor for the lzip format.

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 also produce a correct file by merging the good parts of two or more damaged copies, extract data from damaged files, decompress files and test integrity of files.

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=<range>
decompress a range of bytes (N-M) to stdout
-f, --force
overwrite existing output files
-i, --ignore-errors
make '--range-decompress' ignore data errors
-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 trailing data to standard output
remove trailing data from files in place
copy files to stdout without trailing data

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...

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


Copyright © 2018 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.