Mastering Linux Security and Hardening - Second Edition

Updating Red Hat 8-based systems

The old yum utility has been around for practically forever, and it's been a good, hard-working utility. But it does have its occasional quirks, and at times it can be excruciatingly slow. But not to worry. Our heroes at Red Hat have finally done something about that, by replacing yum with dnf. Now, dnf has been tested on the Fedora distro for the past few years, and it's now a part of the RHEL 8 family. So, when you work with your CentOS 8 virtual machines, you'll use dnf instead of yum. Let's see how to do this:

1. For the most part, you use dnf the same way that you'd use yum, with the same arguments and options. For example, to do a system upgrade, just run the following command:

sudo dnf upgrade

2. The main ...