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In computing, tar is a computer software utility for collecting many files into one archive file, often referred to as a tarball, for distribution or backup purposes. The name is derived from "tape archive", as it was originally developed to write data to sequential I/O devices with no file system of their own, such as devices that use magnetic tape.
tar with gzip, compress, bzip2, lzip, xz, or zstd Multiple Multiple Yes The "tarball" format combines tar archives with a file-based compression scheme (usually gzip). Commonly used for source and binary distribution on Unix-like platforms, widely available elsewhere. Xarchiver supports the .tar.zst Archive/Compression format on Unix-like ...
Windows Update Binary Delta Compression file [59] 37 7A BC AF 27 1C: 7z¼¯'␜ 0 7z 7-Zip File Format 1F 8B ␟‹ 0 gz tar.gz GZIP compressed file [60] FD 37 7A 58 5A 00: ý7zXZ␀ 0 xz tar.xz XZ compression utility using LZMA2 compression 04 22 4D 18 ␄"M␘ 0 lz4 LZ4 Frame Format [61] Remark: LZ4 block format does not offer any magic bytes ...
A tar.gz is created by joining the files in tar and then compressing with gzip. In computing, solid compression is a method for data compression of multiple files, wherein all the uncompressed files are concatenated and treated as a single data block. Such an archive is called a solid archive.
Archive files are particularly useful in that they store file system data and metadata within the contents of a particular file, and thus can be stored on systems or sent over channels that do not support the file system in question, only file contents – examples include sending a directory structure over email, files with names unsupported on the target file system due to length or ...
(The tar program in its own does not compress; it just stores multiple files within one tape archive.) Files can be returned to their original state using uncompress. The usual action of uncompress is not merely to create an uncompressed copy of the file, but also to restore the timestamp and other attributes of the compressed file.
The operating systems the archivers can run on without emulation or compatibility layer. Ubuntu's own GUI Archive manager, for example, can open and create many archive formats (including Rar archives) even to the extent of splitting into parts and encryption and ability to be read by the native program.
In real-world situations, certain data would be difficult to compress, such as a JPG image, and in the gzip stream, it would consume several times more data than the tar container data as tar data is relatively simple to compress. Other types of data, such as those with unusually long run-lengths, might be easier to compress than tar data.