![]() ![]() Xz reads from standard input and writes the processed data to standard output. Xz compresses or decompresses each file according to the selected operation mode. Streams with no container format headers are supported. Description xz is a general-purpose data compression tool with command line syntax similar to dc) instead of the names unxz and xzcat. When writing scripts that need to decompress files, it is recommended to always use the name xz with appropriate arguments ( xz -d or xz Lzcat is equivalent to xz -format=lzma -decompress -stdout. Unlzma is equivalent to xz -format=lzma -decompress. It won't work with unknown source size, such as stdin or pipe.Xzcat is equivalent to xz -decompress -stdout. Note : this option can only be activated when the original size can be determined, hence for a file. ![]() content-size: Header includes original size (default:not present) frame-crc: Select frame checksum (default:enabled) BD: Block Dependency (improves compression ratio on small blocks) This mode also sets -m (multiple input files). lz4 -m has a behavior equivalent to gzip -k (it preserves source files by default). This mode also reduces notification level. Compressed file names will be appended a. c -stdout -to-stdout: Force write to standard output, even if it is the console. This allows lz4cat -force to be used like cat (1) for files that have not been compressed with lz4. When used with -decompress and lz4 cannot recognize the type of the source file, copy the source file as is to standard output. If the target file already exists, overwrite it without prompting. f -force: This option has several effects: ![]() Decompression speed remains fast at all settings. Speed/compression trade-off will vary depending on data to compress. Recommended values are 1 for fast compression (default), and 9 for high compression. Values above 16 are considered the same as 16. Higher values trade compression speed for compression ratio. #: Compression level, with # being any value from 1 to 16. b#: Benchmark mode, using # compression level. t -test: Test the integrity of compressed. decompress is also the default operation when the input filename has an. z can also be used to force compression of an already compressed. This is the default operation mode when no operation mode option is specified, no other operation mode is implied from the command name (for example, unlz4 implies -decompress), nor from the input file name (for example, a file extension. When multiple contradictory commands are issued on a same command line, only the latest one will be applied. They must be clearly separated by a space. Short commands can be concatenated together. In some cases, some options can be expressed using short command -x or long command -long-word. Is equivalent to : cat file1 file2 OPTIONS Short commands concatenation For example: lz4 file1 > foo.lz4 lz4 file2 > foo.lz4 lz4 will decompress such files as if they were a single.
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