Synaptic
Synaptic is a graphical package management program for apt. It provides the same features as the apt-get command-line utility with a GUI front-end based on Gtk+. Install, remove, upgrade and downgrade single and multiple packages. Upgrade your whole system. Manage package repositories (sources.list). Find packages by name, description, and several other attributes. Select packages by status, section, name, or a custom filter. Sort packages by name, status, size, or version. Browse all available online documentation related to a package. Download the latest changelog of a package. Lock packages to the current version. Force the installation of a specific package version. Undo/Redo selections. Built-in terminal emulator for the package manager. Debian/Ubuntu only, configure packages through the debconf system. Debian/Ubuntu only, Xapain-based fast search (thanks to Enrico Zini).
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Cargo
Cargo is the Rust package manager. Cargo downloads your Rust package's dependencies, compiles your packages, makes distributable packages, and uploads them to crates.io, the Rust community’s package registry. You can contribute to this book on GitHub. To get started with Cargo, install Cargo (and Rust) and set up your first crate. The commands will let you interact with Cargo using its command-line interface. A Rust crate is either a library or an executable program, referred to as either a library crate or a binary crate, respectively. Loosely, the term crate may refer to either the source code of the target or to the compiled artifact that the target produces. It may also refer to a compressed package fetched from a registry. Your crates can depend on other libraries from crates.io or other registries, git repositories, or subdirectories on your local file system. You can also temporarily override the location of a dependency.
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PyPI
PyPI is the official repository for Python software packages, hosting hundreds of thousands of projects that developers can publish and users can discover and install. It supports both source distributions (“sdists”) and pre-built binary “wheels”, allowing packages to include native extensions for different platforms. Projects on PyPI consist of multiple releases, each of which can include various files for different operating systems or Python versions. Metadata for each package includes things like version number, dependencies, licensing, classifiers, description (including rendering Markdown or reStructuredText), and other information that tools like pip use to resolve, download, and install the correct package. PyPI provides search and filtering based on package metadata, letting users find what they need via keywords, compatibility, or other package attributes.
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Homebrew Cask
A CLI workflow for the administration of macOS applications distributed as binaries. Homebrew Cask extends Homebrew and brings its elegance, simplicity, and speed to the installation and management of GUI macOS applications such as Atom and Google Chrome. We do this by providing a friendly CLI workflow for the administration of macOS applications distributed as binaries. To start using Homebrew Cask, you just need Homebrew installed. Homebrew Cask installs macOS apps, fonts and plugins, and other non-open source software. Homebrew Cask is implemented as part of Homebrew. All Homebrew Cask commands begin with brew, which works for both Casks and Formulae. The command brew install accepts one or multiple Cask tokens. Homebrew Cask comes with bash and zsh completion for the brew command. Since the Homebrew Cask repository is a Homebrew Tap, you’ll pull down the latest Casks every time you issue the regular Homebrew command brew update.
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