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Package management in RHEL is designed to facilitate the installation, update, and removal of software packages. RHEL utilizes RPM (Red Hat Package Manager) for individual package management and `yum` or `dnf` for handling repositories and dependencies.

`yum` is a command-line package-management utility for computers running the Linux operating system using the RPM Package Manager. It automates the process of installing, updating, removing packages, and managing repositories.

- **Dependency Resolution:** Automatically resolves and installs dependencies for packages. - **Repository Management:** Manages a wide range of repositories and their respective packages. - **Automatic Updates:** Facilitates automatic updates of packages to ensure security and stability. - **Group Installation:** Allows the installation of packages in groups. - **Plugin System:** Supports plugins to extend its functionality.

`dnf` has replaced `yum` as the default package manager in RHEL 8 and newer versions, offering improved performance and dependency resolution.

- **Improved Performance:** Better performance and reduced memory usage compared to `yum`. - **Modern Dependency Solving:** Uses libsolv for dependency resolution. - **Modular Content Support:** Supports AppStream and modules for software management. - **Enhanced User Experience:** Provides clearer feedback during package management operations.

1. **Updating Package Repository Data (`yum`/`dnf`):** ```bash sudo yum update

1. or

sudo dnf update ```

2. **Installing a Package (`yum`/`dnf`):** ```bash sudo yum install package_name

1. or

sudo dnf install package_name ```

3. **Removing a Package (`yum`/`dnf`):** ```bash sudo yum remove package_name

1. or

sudo dnf remove package_name ```

4. **Listing Installed Packages (`yum`/`dnf`):** ```bash yum list installed

1. or

dnf list installed ```

5. **Searching for a Package (`yum`/`dnf`):** ```bash yum search keyword

1. or

dnf search keyword ```

6. **Checking for Updates (`yum`/`dnf`):** ```bash yum check-update

1. or

dnf check-update ```

7. **Upgrading Packages (`yum`/`dnf`):** ```bash sudo yum upgrade

1. or

sudo dnf upgrade ```

8. **Enabling a Repository (`yum`/`dnf`):** ```bash sudo yum-config-manager –enable repository_name

1. or

sudo dnf config-manager –set-enabled repository_name ```

- **EPEL (Extra Packages for Enterprise Linux):** Provides a repository of high-quality add-on packages for RHEL and CentOS. - **RPM Fusion:** Offers software that the Fedora project or Red Hat doesn't want to ship. - **Remi Repository:** Provides newer versions of PHP and MySQL among other software. - **Negativo17:** Offers multimedia and hardware support packages. - **RPMForge/RepoForge:** A package repository that's not officially affiliated with Red Hat but provides a large number of packages.

- **APT (Debian/Ubuntu):** A package manager used in Debian-based distributions. - **Pacman (Arch Linux):** The package manager for Arch Linux, focusing on simplicity and user control. - **Zypper (openSUSE):** A command-line interface management tool that uses the `libzypp` library for package management. - **Portage (Gentoo):** A package management system that uses a ports-like approach, highly configurable and source-based.

- **Official Documentation:** The RHEL documentation provides comprehensive guides on using `yum` and `dnf`, available at Red Hat's official website s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/(https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/). - **GitHub Repository:** While `yum` and `dnf` are open-source, their development is more centralized than projects hosted on GitHub. However, you can find `dnf` at s://github.com/rpm-software-management/dnf(https://github.com/rpm-software-management/dnf). - **Official Website:** For official releases, news, and updates, visit s:// www.redhat.com/(https://www.redhat.com/). - **Wikipedia Page:** For a broader overview and history, visit the Wikipedia page for RPM Package Manager s://en.wikipedia.org/wiki/RPM_Package_Manager(https://en.wikipedia.org/wiki/RPM_Package_Manager) and YUM s://en.wikipedia.org/wiki/Yellowdog_Updater,_Modified(https://en.wikipedia.org/wiki/Yellowdog_Updater,_Modified).

This summary provides an insight into RHEL package management, highlighting `yum` and `dnf` as the primary tools for managing software packages. For a deeper exploration, the provided documentation and official resources offer extensive information.