General options

--stdout

-c

Output to STDOUT.

--check

-C

Check integrity of file written on decompression.

--decompress

-d

Decompress.

--encrypt[=password]

-e

Password protect sha512/aes128 encryption on compression.

--help

-h

-?

Show help.

--hash

-H

Display md5 hash integrity information.

--info

-i

Show compressed file information.

--license

-L

Display software version and license.

--progress

-P

Show compression progress.

--recursive

-r

Operate recursively on directories.

--test

-t

Test compressed file integrity.

--verbose

-v[vv]

Increase verbosity.

--version

-V

Show version.

Options affecting output

--force

-f

Force overwrite of any existing files.

--keep

-k

Don't delete source files on de/compression.

--keep-broken

-K

Keep broken or damaged output files.

--outfile name

-o name

Specify the output file name and/or path.

--outdir dir

-O dir

Specify the output directory when -o is not used.

--suffix suffix

-S suffix

Specify compressed suffix (default '.lrz').

Options affecting compression

--bzip2

-b

Bzip2 compression.

--gzip

-g

Gzip compression using zlib.

--lzo

-l

Lzo compression (ultra fast).

--lzma

Lzma compression (default).

--no-compress

-n

No backend compression - prepare for other compressor.

--zpaq

-z

Zpaq compression (best, extreme compression, extremely slow).

Low level options

-1 .. -9

--level level

-L level

Set lzma/bzip2/gzip compression level (1-9, default 7).

--fast

Alias for -1.

--best

Alias for -9.

--nice-level value

-N value

Set nice value to value (default 0).

--threads value

-P value

Set processor count to override number of threads.

--maxram size

-m size

Set maximum available ram as size * 100 MB. Overrides detected amount of available ram.

--threshold

-T

Disable LZ4 compressibility testing.

--unlimited

-U

Use unlimited window size beyond ramsize (potentially much slower).

--window size

-w size

Set maximum compression window as size * 100 MB. Default chosen by heuristic dependent on ram and chosen compression.

See also lrzip(1)