Common issues when setting up CentOS 7 and how to solve them

CentOS is the most common Linux distribution used for production servers, since it is a very stable operating system, fully compatible with Red Hat Enterprise Linux (RHEL). The disk images required for the installation of CentOS 7 can be downloaded for free from the project’s website, and the installation process is very simple because it …

CentOS 7 Help and Tutorials (updated August 2019)

Especially with the recent retiring of CentOS 5 on March 31, 2017, use of version 7 is on the rise. For new systems being installed now, it makes much more sense to go straight to CentOS 7 unless there is a specific compatibility issue. CentOS 6 will have maintenance updates through 2020. The minimum recommended …

IBM buys RedHat – Possible implications for users

IBM’s acquisition of RedHat was initially announced in October 2018 and sent shockwaves through the open-source community. In May, the deal was approved by the US Department of Justice, which allowed IBM to close it earlier this month. The value of the deal was $34 million, or $190 per share. Considering that RedHat shares were …

The new cPanel pricing model and its implications

The news that cPanel has decided to move to a new pricing model, resulting in significant price hikes for most customers, has shocked the hosting world. Most of the important hosting companies depend heavily on WHM/cPanel, especially for shared packages. The platform has become so popular that it is now considered a standard, and most …

New Exim vulnerability affecting millions – how to protect yourself

Vulnerabilities are discovered very often in various computer programs, and most of them are quickly patched by developers. Typical vulnerabilities disappear almost un-noticed, since they are fixed by routine update schedules. In fact, most vulnerabilities are never exploited, since they are discovered by security professionals rather than hackers, or are very difficult to execute. However, …

What to do when a CentOS 7 yum update fails

Package manager yum is one of the most important tools available to a CentOS 7 system administrator. If the command fails to work, due to various reasons, the update, installation and removal of packages becomes a very difficult task. While software can still be installed from RPMs or compiled from source, yum has many advantages …

How to use atop

You are probably already familiar with the system monitoring tool top or similar programs such as htop, iotop or mytop. Atop is another related command line monitoring tool that provides extended functionality. It displays more information than top and can for example report the resource usage of completed processes. The most useful feature of atop …

Self-hosted Discord bots compared, which one is the best?

The popularity of chat application Discord has skyrocketed in the gaming community, where it is now the main communication tool. Discord has many advantages, one of the most important is the fact that it is open source and can be easily self-hosted. That means that you can quickly setup a server of your own, create …