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As the Linux world evolves, so do its tools. A notable change in recent years is the transition from the YUM (Yellowdog Updater Modified) to DNF (Dandified YUM) package manager in Fedora-based systems. This switch isn't just about a change in name; DNF offers improvements in speed, efficiency, and configuration readability over its predecessor. In this guide, we'll explore how to switch from YUM to DNF on older systems and give you a brief primer on other package managers like APT and Zypper. Before diving into the transition process, let’s quickly differentiate between YUM and DNF: YUM: Traditionally used in older Red Hat-based systems (like CentOS and RHEL 7 and below), YUM relies on Python 2.7.