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Ubuntu (/ ʊ ˈ b ʊ n t uː / ⓘ uu-BUUN-too) [8] is a Linux distribution derived from Debian and composed mostly of free and open-source software. [9] [10] [11] Ubuntu is officially released in multiple editions: Desktop, [12] Server, [13] and Core [14] for Internet of things devices [15] and robots.
To aid the user in understanding conflicts more intuitively, Bison can instead automatically generate counterexamples. For ambiguous grammars, Bison often can even produce counterexamples that show the grammar is ambiguous. For instance, on a grammar suffering from the infamous dangling else problem, Bison reports
Metalink is an extensible metadata file format that describes one or more computer files available for download.It specifies files appropriate for the user's language and operating system; facilitates file verification and recovery from data corruption; and lists alternate download sources (mirror URIs).
For APT, a repository is a directory containing packages along with an index file. This can be specified as a networked or CD-ROM location. As of 14 August 2021, [update] the Debian project keeps a central repository of over 50,000 software packages ready for download and installation.
Ubuntu releases are also given code names, using an adjective and an animal with the same first letter – an alliteration, e.g., "Dapper Drake".With the exception of the first two releases, code names are in alphabetical order, and except for the first three releases, the first letters are sequential, allowing a quick determination of which release is newer.
Ubuntu since version 18.04 [14] Alpine Linux in community repository [ 15 ] Most other distributions have made dracut available as an optional package to replace the distribution's default initramfs generator.
A software repository, or repo for short, is a storage location for software packages. Often a table of contents is also stored, along with metadata. A software repository is typically managed by source or version control, or repository managers. Package managers allow automatically installing and updating repositories, sometimes called "packages".