System administration is the process of managing a group of computer systems, or computing resources, which are managed as single system or resource. A system administrator typically defines a system or resource by defining a system management model, defining the objects and components of the system, and defining the relationships between the objects and components.
For example, a system administrator could define a business management system which has users, computers, storage and printers. In another example, a system administrator may define a network management system which has computers, networks, services, users, and routers.
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
If you develop your project on Django, then you probably know that you need a web server like nginx to serve your static files: images, stylesheets and so on. While Django has its own ability to serve static files, you should use it only during development. In this guide you will learn how to install … Read more
In this tutorial, I will show you how to install Django, MariaDB on Debian 11 (codenamed Bullseye) from official repository. This tutorial also applies to all Debian-based distribution, for example, Ubuntu. We will use Debian 11 because it is one of the most popular GNU/Linux distributions and is a well supported operating system. Installing Python … 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
MySQL is an open-source relational database management system (RDBMS). It is most commonly used to store, access, and modify data in a centralized database. A database is a collection of all the information stored on a computer, and MySQL is a database management system (DBMS) for databases. While MySQL is an RDBMS, it does not … 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
As an experienced GNU/Linux system administrator, I’ve been recommending Debian to my colleagues as the go-to GNU/Linux distribution for servers. Ubuntu is an attractive alternative, and for small to medium-sized installations I like it a lot. However, I’m also an Ubuntu user and I still like Debian and feel comfortable working on servers running Debian. … Read more