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A Docker service allows containers to be scaled across multiple Docker daemons. The result is known as a swarm, a set of cooperating daemons that communicate through the Docker API. [23] Registries: A Docker registry is a repository for Docker images. Docker clients connect to registries to download ("pull") images for use or upload ("push ...
dpkg is used to install, remove, and provide information about .deb packages. dpkg (Debian Package) itself is a low-level tool. APT (Advanced Package Tool), a higher-level tool, is more commonly used than dpkg as it can fetch packages from remote locations and deal with complex package relations, such as dependency resolution.
In software engineering, containerization is operating-system–level virtualization or application-level virtualization over multiple network resources so that software applications can run in isolated user spaces called containers in any cloud or non-cloud environment, regardless of type or vendor. [1]
apt-build is used by distributions which use deb packages, allowing automatic compiling and installation of software in a deb source repository; Sorcery is Sourcemage GNU/Linux 's bash based package management program that automatically downloads software from their original site and compiles and installs it on the local machine;
Diagram showing an example file structure of a .deb file Frhed hex editor displaying the raw data of a Debian package. Prior to Debian 0.93, a package consisted of a file header and two concatenated gzip archives. [6] Since Debian 0.93, a deb package is implemented as an ar archive. [7] This archive contains three files in a specific order: [8] [9]
Notably, APT automatically gets and installs packages upon which the indicated package depends (if necessary). This was an original distinguishing characteristic of APT-based package management systems, as it avoided installation failure due to missing dependencies, a type of dependency hell.
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".
Examples of these systems include Apt, Yum, Urpmi, ZYpp, Portage, Pacman and others. Typically, the software repositories are FTP sites or websites, directories on the local computer or shared across a network or, much less commonly, directories on removable media such as CDs or DVDs.