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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.
pax is an archiving utility available for various operating systems and defined since 1995. [1] Rather than sort out the incompatible options that have crept up between tar and cpio, along with their implementations across various versions of Unix, the IEEE designed a new archive utility pax that could support various archive formats with useful options from both archivers.
MS-DOS commands like dir and Windows apps like File Explorer do not show hidden files by default, unless asked to do so. [4] System (S): When set, indicates that the hosting file is a critical system file that is necessary for the computer to operate properly. MS-DOS and Microsoft Windows use it to mark important system files.
Compressed test files had been added to the code for setting up the backdoor via additions to the configure script in the tar files. He started his investigation because "After observing a few odd symptoms around liblzma (part of the xz package)" as he found that ssh logins using sshd were "taking a lot of CPU, valgrind errors". [14]
A single file container/archive that can be reconstructed even after total loss of file system structures. .tar application/x-tar Tape archive: Unix-like A common archive format used on Unix-like systems. Generally used in conjunction with compressors such as gzip, bzip2, compress or xz to create .tar.gz, .tar.bz2, .tar.Z or tar.xz files.
A bug in the compression process can cause run-away generation of useless log files both in that folder and in C:\Windows\Temp, which can consume disk storage until completely filling the hard drive. [ 15 ] [ 16 ] Deletion of the files without following a specific procedure [ 16 ] can cause the deleted files to be regenerated at an increased pace.
Archiving various uncompressed files via tar and then compressing yields a compressed archive: a .tar.gz file – this is solid compression. A rough graphical representation: In this example, three files each have a common part with the same information, a unique part with information not in the other files, and an "air" part with low-entropy ...
Per-file compression with gzip, bzip2, lzo, xz or lzma (as opposed to compressing the whole archive). An individual can choose not to compress already compressed files based on their filename suffix. Fast-extracting of files from anywhere in the archive; Fast listing of archive contents through saving the catalogue of files in the archive