Stefan Kecskes

Never stop learning, because life never stops teaching

Kubernetes basics

Kubernetes basics For some time there were two great tools called DockerSwarm and Kubernetes, both trying to achieve similar goals, be orchestration tools for containerized applications, but at some point it was clear that one of them became more popular among developers and became an industry standard. We could speculate saying that developers are lazy, and they don’t want to write complex yaml files for their deployments, but the truth is that Kubernetes is more flexible and extensible tool, provides more mature features, like self-healing, rollouts and rollbacks, secret management, auto-scaling and I mean really large scale applications, adoption by big companies like Google, Microsoft, Amazon, IBM, etc.

Posted by Stefan Kecskes on Wednesday, April 24, 2024

Docker Volumes

Docker Volumes I am using docker in personal and professional projects for a couple of years now. Like everybody else, I learned it as I went along and learned as little as I needed to know to be able to deliver what I wanted. I never had a chance to sit down and look deeper into it (as no one does these days). But from time to time, I like to dive deeper to figure out more about handling data with docker.

Posted by Stefan Kecskes on Monday, February 19, 2024

Update Python on Ubuntu 22.04

Ok, so you have a fresh installation of Ubuntu 22.04 (Jammy Jellyfish), and you would like to update the default Python 3.10 that comes preinstalled in Ubuntu 22.04 to the latest version. It seems trivial, as you think that you can just uninstall the old version and install the new one. But it is not that simple. The problem is that Ubuntu 22.04 uses python 3.10 for some of its internal tools, and if you uninstall it, you will break your system.

Posted by Stefan Kecskes on Friday, December 1, 2023

Using GPG key for Git commits on Linux

Introduction “Hey, Stefan, can you please push your changes to the Git repository?” - asked my colleague. “and make sure you sign your commits with GPG!” - he added. “Sure, I will do that!” - I replied. But wait a minute, what is GPG signing? And why should I use it? PGP (Pretty Good Privacy) was initially developed by Phil Zimmermann in 1991 as a commercial product and was designed as a way to encrypt and decrypt email messages.

Posted by Stefan Kecskes on Wednesday, November 29, 2023

Symlinks in Unix

Create a link in Unix A symbolic link is a special form of a file. Actually it is not a file just a pointer to a file. This link points to another file somewhere in the file system. You can create link to files and folders. By the look, feel and functionality it is same as Windows shortcut or alias on iOS systems. If the content of the original file changes, so does the content of symlink.

Posted by Stefan Kecskes on Friday, March 15, 2019