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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, 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
-f, --force
overwrite existing output files
-i, --ignore-errors
all errors in -D, format errors in -l, --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...

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
Lziprecover home page:


Copyright © 2019 Antonio Diaz Diaz. License GPLv2+: GNU GPL version 2 or later <>
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 2019 lziprecover 1.21