2.6 Managing Software with DNF (dnf): A Comprehensive Guide

Managing software on a Linux system is a crucial task for system administrators and users alike. DNF (Dandified YUM) is a package manager used in Fedora and other RPM-based Linux distributions. In this guide, we'll explore various commands and operations to efficiently handle software using dnf.

Checking and Upgrading Software

• Check for upgrades:

    dnf check-upgrade
  

• Upgrade installed packages:

    sudo dnf upgrade
  

Repository Management

• Check repository list:

    sudo dnf repolist
  

  or

    sudo dnf repolist -v
  

• List all repositories (enabled and disabled):

    sudo dnf repolist --all
  

• Enable/Disable a repository:

    sudo dnf config-manager --enable repo_name
    sudo dnf config-manager --disable repo_name
  

• Add a new repository:

    sudo dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
  

• Remove a repository:

    sudo rm /etc/yum.repos.d/docker-ce.repo
  

Package Management

• Search for packages:

    sudo dnf search packageName
  

  For more accuracy:

    sudo dnf search 'packageName'
  

• Get information about a package:

    sudo dnf info packageName
  

• Install a package:

    sudo dnf install packageName
  

• Reinstall a package:

    sudo dnf reinstall packageName
  

• Uninstall or remove a package:

    sudo dnf remove packageName
  

• Group Operations:

  • Install a group of packages:

      sudo dnf group install 'packageName'
    

  • List available groups:

      sudo dnf group list
      sudo dnf group list --hidden
    

  • Remove a group of packages:

      sudo dnf group remove 'packageName'
    

Local Package Operations

• Install a local RPM file:

    sudo dnf install ./packageName.rpm
  

• Remove a locally installed package:

    sudo dnf remove packageName.rpm
  

Dependency Management

• Remove unnecessary dependencies:

    sudo dnf autoremove
  

File Management

• Identify file origin (for troubleshooting):

    dnf provides /etc/anacrontab
  

  After identifying an issue with a file (e.g., bad edits), reinstall the package:

    sudo rm /etc/anacrontab
    dnf reinstall cronie-anacron
  

• View all files in a package (installed or not):

    dnf repoquery -l packageName
  

This comprehensive guide should empower users and administrators to efficiently manage software on their Linux systems using the versatile dnf package manager.