This is a collection of GNU/Linux-related articles – system administration, bash, command-line, software and so on. It will help you to get the most from your GNU/Linux experience.
If you are an experienced system administrator you may want to setup your own email server. Setting up a custom email server is a challenging task, but you gain a better understanding of how email works and its inner mechanism by completing it. In this tutorial, you will learn how to setup a full-featured Linux … Read more
SMTP is one of the oldest application-layer protocols. It is used to deal with email. Despite it is called “Simple Mail Transfer Protocol”, it is in fact really complicated. One of the things that may confuse you is the vast amount of ports you need to open if you want to host an email relay. … Read more
You’ve rented a server or VPS/VDS. Your fresh new remote machine is here and you want to login right now. So do hackers and bots. But how to secure your server? Let’s figure out. Prerequisite: trustworthy hosting provider First, ensure that your server is hosted by a reliable server provider. If you use shared hosting, … Read more
In some of Xorg Linux applications you might see the following error when you use certain Unicode characters, like “❔” (fancy question mark): The numbers can be different, but the error persists. Typically, it crashes the application. There are various solutions to this problem, but I found the most optimal one. You just need to … Read more
A lot of users decide whether or not to upgrade Ubuntu Linux with a simple “Yes” or “No” answer. However, you don’t have to do that — you can find out for yourself whether the new version of Ubuntu is a good fit for you with the following questions: “Will this new version solve all … Read more
Kali Linux is free and open source software used for penetration testing, ethical hacking, red teaming, network security and so on. What are the benefits of using Kali Linux for programming? Kali Linux is good for programming because it has many tools for working with the terminal, IDE and GUI. Kali Linux provides a large … Read more
Ubuntu Linux has been around for ages. Fedora is a much newer distro. I’ve used both, and my first impression of Fedora is: if you’re going to start over from scratch, I’d start with Ubuntu and see how it goes. That’s not to say that Fedora isn’t a great distribution. My point is that Fedora … Read more
Arch Linux is an excellent lightweight GNU/Linux distribution. It’s very well documented, and it’s fast. Even if you are not a die-hard Linux geek, you can learn quite a bit about GNU/Linux from it, as it’s often used as a reference distro. This is tutorial on how to install Arch Linux on your laptop or … Read more
The GNU/Linux Operating System is free and open-source and its source code is available to everyone. There is no central authority telling you what you can do and what you can’t do, so it is more secure than Windows. Since Linux is available to everyone, more people are building and contributing to the software. Another … Read more
As many of you probably know, one of the most used web servers in the world is Apache and the other one is Nginx. When it comes to PHP and other dynamic languages, which one is better? What advantages does each one have? In this article I will compare Apache vs Nginx. Let’s start. What … Read more