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[ Linux Command Manual](#) * * * dnf (Dandified YUM) is the next-generation RPM package manager for RPM-based Linux distributions (such as Fedora, RHEL 8+, CentOS 8+, etc.). It is a replacement for yum, providing faster dependency resolution, a more modern codebase, and better performance. The main functions of dnf include: * Installing, updating, and removing packages from software repositories * Automatically resolving package dependencies * Querying package information * Managing software repositories * * * ## dnf Basic Syntax The basic syntax format of the dnf command is: dnf Where: * ``: Optional parameters used to modify dnf behavior * ``: The main operation to be performed (such as install, remove, etc.) * ``: Additional information required by the command (usually package names) * * * ## Common dnf Commands ### Package Management ## Examples # Install package dnf install # Reinstall package dnf reinstall # Update package dnf update # Update all updatable packages dnf update # Remove package dnf remove # Remove unnecessary dependencies dnf autoremove ### Query Operations ## Examples # Search for packages dnf search # List installed packages dnf list installed # List all available packages dnf list available # Display package information dnf info # View files provided by package dnf provides ### Repository Management ## Examples # List all enabled repositories dnf repolist # List all repositories (including disabled) dnf repolist all # Enable repository dnf config-manager --enable # Disable repository dnf config-manager --disable # Add new repository dnf config-manager --add-repo ### System Upgrade ## Examples # Check for system updates dnf check-update # Perform system upgrade dnf upgrade # Upgrade to new release dnf system-upgrade * * * ## Common dnf Options | Option | Description | | --- | --- | | `-y` | Automatically answer "yes" | | `-q` | Quiet mode, reduce output | | `-v` | Verbose output | | `--refresh` | Refresh repository metadata before operation | | `--nogpgcheck` | Disable GPG signature checking | | `--skip-broken` | Skip problematic packages | | `--best` | Try to install the best available version | * * * ## Practical Application Examples ### Example 1: Install Development Tools Group ## Examples # Install development tools group (includes gcc, make, etc.) sudo dnf groupinstall "Development Tools"-y ### Example 2: Find and Install Specific Software ## Examples # Search for packages containing nginx dnf search nginx # Install nginx sudo dnf install nginx -y # Start nginx service sudo systemctl start nginx ### Example 3: Clean Cache ## Examples # Clean downloaded package cache sudo dnf clean packages # Clean all cache (metadata and packages) sudo dnf clean all ### Example 4: View History ## Examples # List dnf operation history dnf history # View detailed information of specific transaction dnf history info # Undo specific transaction dnf history undo * * * ## dnf Configuration File The main configuration file for dnf is located at `/etc/dnf/dnf.conf`. Common configuration items include: ## Examples gpgcheck=1 # Whether to check GPG signatures installonly_limit=3 # Number of kernel versions to keep clean_requirements_on_remove=True # Clean dependencies when removing best=True # Always try to install the best version You can view the current configuration with the following command: dnf config-manager --dump * * * ## dnf vs yum Comparison | Feature | dnf | yum | | --- | --- | --- | | Dependency resolution algorithm | libsolv (faster) | Custom (slower) | | API | Stable | Unstable | | Memory usage | Lower | Higher | | Performance | Faster | Slower | | Plugin system | Compatible with yum plugins | Native plugins | | History | More detailed | Basic records | * * * ## Common Problem Solving ### 1. Dependency Conflicts ## Examples # Try to automatically resolve dependency issues sudo dnf --skip-broken install # Or try to exclude specific packages sudo dnf install--exclude= ### 2. Corrupted Repository Metadata ## Examples # Clean and rebuild repository cache sudo dnf clean all sudo dnf makecache ### 3. Package Version Locking ## Examples # Lock package to prevent updates sudo dnf versionlock add # List locked packages sudo dnf versionlock list # Remove lock sudo dnf versionlock delete * * * ## Best Practices 1. **Regularly update the system**: sudo dnf update -y 2. **Search before installing**: dnf search <keyword> 3. **View impact of changes**: sudo dnf update --assumeno 4. **Use group commands to manage related software**: # List available groups dnf group list # Install group sudo dnf groupinstall "group name" 5. **Keep repositories clean**: # Regularly clean unnecessary packages sudo dnf autoremove * * * Through this article, you should have mastered the basic usage and advanced techniques of the dnf command. As a package management tool for modern RPM systems, dnf provides powerful and efficient software management capabilities. It is recommended to try different commands and options in actual use, and gradually become familiar with its various functions. * * Linux Command Manual](#)