When you learn about DevOps, you will come across the concept of a container early on. This is a “Mischa Explains” article where I attempt to explain a concept in my own words as simply as possible. I use the Feynman technique and pretend to explain it to a 12-year-old. Virtualization To understand containers, we need to understand virtualization. Virtualization is the process of creating “fake computers” or “virtual computers” on a physical computer. ...
This book is the sequel to the Phoenix project. Both books are set at Parts Unlimited, a fictitious company that supplies car parts to DIY mechanics and repair shops. Phoenix is a new system that Parts Unlimited has worked on for multiple years. It is supposed to handle order processing and communication between manufacturing, stores, and clients. Phoenix will also play a role in sales and marketing. The company has been gathering customer data for years, but it cannot use any of this data yet. Phoenix will enable it to generate targeted marketing campaigns from the data when it’s finished. ...
If you are just starting your Linux journey, you might have noticed that a few camps exist in the Linux world. Just like in any other area of life, it seems that groups of human beings enjoy dividing themselves instead of living in harmony. There are camps centered around Linux distributions (I use Arch, btw) but also around text editors. The Beginning The reason why I started to use vim is rather practical. When I was studying to become a Cloud Engineer, I had access to subscriptions on AWS and Azure to experiment with virtual machines. This was a perfect place to learn to work with Ansible. Many of the labs projects I did involved setting up a few virtual machines, and I destroyed many VMs when I made some big mistakes in the configuration. ...
NOTE: In this article, I use a rather broad definition of “Operating System.” I do not intend to appear as if I wrote and compiled my own Linux kernel, nor do I understand the inner workings of the kernel written in C. Instead, with “building my OS from scratch,” I intend to convey that I used a minimal Linux distribution as a starting point and started building from there. introduction I started using GNU/Linux as a daily driver about six months ago, and I have not regretted the decision ever since. There has not been a single use case where I needed to use Windows for anything at all. ...
Last week I upgraded Jenkins to the latest version on the server infrastructure at work. Starting with the Jenkins 2.357 release, Java 11 or Java 17 will be required to run Jenkins. Also, the upcoming LTS release will require Java 11. This means that I also needed to update Java on our Jenkins servers. Here are the steps that I did to perform the Jenkins and Java upgrade. SSH into the server and stop the service. Then get the latest upgrades for your server, which is good practice: ...
I have installed my OS on a 240GB SSD, and I prefer to keep my data on a different disk to leave enough space to work with. I wanted to move my steam game files to a separate hard drive on Linux. I’ll show you what I did to make this happen in this article. I use Manjaro GNOME. First, you need a correctly partitioned hard drive. To wipe your drive clean and have a single partition on it, we’ll use GParted. ...
After getting my LPIC-1 certification, my interest in Linux continued to grow. When I started my new job, I performed more sysadmin tasks, such as increasing the size of filesystems or removing backups, and it felt good to put the theory into practice. I was still using Windows in my personal setup, and I started running into limitations. Finally, I realized how much I appreciated the freedom and control over my system that Linux gave me. So I decided I wanted to switch to Linux for my daily operating system. But a few things were holding me back. Will I be able to play my favorite games? Will I run into a lot of problems with my sound and microphone? Are all the apps I need for working from home available on Linux? Can I even edit videos on Linux? ...
This week I learned about yadm: yet another dotfile manager. It is the perfect way to keep track of all your custom configuration files, known as dotfiles. Even if you have only a little bit of experience with Linux, you know that everything is managed in files. All configuration parameters are set or changed in text files stored on the hard disk. These files are usually located in your home directory and are hidden by default. This is indicated by prefixing the file with a period. So the configuration file for the vim editor is .vimrc, and for zshell you use the .zshrc. This is why configuration files are referred to as dotfiles. ...
I recently obtained my LPIC-1 certification, and in this blog post, I’ll share the strategy and techniques I used to pass this exam and share my thoughts on the certification. Because I am a Linux novice, the exam was a pretty tough grind for me. This article offers a beginner’s perspective on the LPIC-1 certification. Is the LPIC-1 hard to pass? Keep reading to find out. Before this certification, I had only a little bit of experience. I deployed LAMP stacks using Ansible and configured VMs to be able to communicate with each other using only the command line. I also did a “Linux Fundamentals” video training. I could navigate the filesystem, edit text files and work in the terminal, but that was about it. ...