Using -f two or more times forces things like - compress files that already have a. (de-)compress to stdout even if it seems a terminal (de-)compress from stdin even if it seems a terminal If DIR is omitted, then write to the current working directory. Write output files into the directory DIR instead of the directory determined by the input file. If there are several input files, the output consists of a sequence of independently (de)compressed members. To obtain better compression, concatenate all input files before compressing them. Display the version number and compilation options and quit. L, -licenseĭisplay the lzop license and quit. I, -sysinfoĭisplay information about the system and quit. infoįor each compressed file, list the internal header fields. The following flags are currently honoured: F Append a '*' for executable files. List each compressed file in a format similar to ls -ln. Note that lzop defines compression ratio as compressed_size / uncompressed_size. With -quiet, the title and totals lines are not displayed. With -verbose, the size totals and compression ratio for all files is also displayed. With -name, the uncompressed name, date and time are those stored within the compress file if present. In combination with the -verbose option, the following fields are also displayed: date & time: time stamp for the uncompressed file Uncompressed_name: name of the uncompressed file l, -listįor each compressed file, list the following fields: method: compression method x, -extractĮxtract compressed files to the current working directory. Each file will be placed into same the directory as the compressed file. Regulate the speed of compression using the specified digit #, where -1 or -fast indicates the fastest compression method (less compression) and -9 or -best indicates the slowest compression method (best compression). If no other command is given then lzop defaults to compression (using compression level -3). These compression levels are mainly intended for generating pre-compressed data - especially -9 can be somewhat slowĭecompression is very fast for all compression levels, and decompression speed is not affected by the compression level. 1, -fastĬan be even a little bit faster in some cases - but most times you won't notice the difference -7, -8, -9, -best 2, -3, -4, -5 and -6 are currently all equivalent - this may change in a future release. The default level offers pretty fast compression. Lzop offers the following compression levels of the LZO1X algorithm: -3 Compression and decompression speed is generally much faster than that achieved by gzip, but compression ratio is worse. Typically, text such as source code or English is compressed into 40-50% of the original size, and large files usually compress much better than small ones. The amount of compression obtained depends on the size of the input and the distribution of common substrings. Lzop uses the LZO data compression library for compression services. Lzop always keeps original files unchanged unless you use the option -U. See the options -n, -N, -no-mode and -no-time for more information. When decompressing lzop restores the mode and time stamp if present in the compressed files. Lzop preserves the ownership, mode and time stamp of files when compressing. This is useful when the compressed file name was truncated or when the time stamp was not preserved after a file transfer. These can be used when decompressing the file with the -d option. Lzop stores the original file name, mode and time stamp in the compressed file. tzo extension if necessary instead of truncating a file with a. lzop -d also recognizes the special extension. lzo and which begins with the correct magic number to an uncompressed file without the original extension. lzop -d takes a list of files on its command line and decompresses each file whose name ends with. If the compressed file name is too long for its file system, lzop truncates it.Ĭompressed files can be restored to their original form using lzop -d. In particular, it will ignore directories. lzop will only attempt to compress regular files or symbolic links to regular files. If no files are specified, or if a file name is "-", lzop tries to compress the standard input to the standard output. lzo, while keeping the same ownership modes, access and modification times. Whenever possible, each file is compressed into one with the extension. Lzop reduces the size of the named files. lzop favors speed over compression ratio. Lzop is a file compressor very similar to gzip.
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