Introduction to DNF History and How to Rollback Updates

In this article we will discuss the DNF (or YUM) history command. This command allows you view a timeline of DNF transactions. This high view of package manager transactions makes it easy to correct issues and see exactly what has…

How to Generate a SSL/TLS Certificate Signing Request (CSR) on Debian 10

For any live website, SSL Certificates have become a key requirement. A Certificate Authority (CA) verifies and issue SSL certificates. There are two categories of these certificates: Self-Signed certificates: As the name implies, these are the certificates that are signed…

How To Create Your Own Internet Radio Station Using Icecast And Mixxx Running On Ubuntu/Debian Or Fedora

This article explains how to create your own Internet radio station. To achieve this we’ll use Icecast and Mixxx open source programs running on Fedora or Debian, Ubuntu, Linux Mint, Pop!_OS and other Debian/Ubuntu-based Linux distributions. Icecast (Icecast 2) is…

How to Add Windows and Linux host to Nagios Server for Monitoring

By James Kiarie  In the previous article, we demonstrated how to install Nagios Core on CentOS 8 / RHEL 8 server. In this guide, we will dive deeper and add Linux and Windows hosts to the Nagios Core server for monitoring. Adding…

Build a virtual private network with Wireguard

Posted by Peter Maynard Wireguard is a new VPN designed as a replacement for IPSec and OpenVPN. Its design goal is to be simple and secure, and it takes advantage of recent technologies such as the Noise Protocol Framework. Some…

7 steps to securing your Linux server

By Patrick H. Mullins https://opensource.com/article/19/10/linux-server-security This primer will introduce you to basic Linux server security. While it focuses on Debian/Ubuntu, you can apply everything presented here to other Linux distributions. I also encourage you to research this material and extend…