Stefan Kecskes

Never stop learning, because life never stops teaching

Kubernetes basics

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. and can run in single cloud, multi-cloud, on-premises, hybrid cloud, etc. This might take longer to learn, but at the end it is worth it. So buckle up and let’s dive into the Kubernetes basics.

Posted by Stefan Kecskes on Wednesday, April 24, 2024

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. And then I thought to myself that what I summarized for myself mighty actually be helpful for someone else too. Therefore, if you are interested in knowing more about docker volumes, you are in the right place.

Posted by Stefan Kecskes on Monday, February 19, 2024

Lifetimes in Rust functions

Lifetimes in Rust are a way for the Rust compiler to ensure that the references are always valid. They prevent dangling references or data races. The compiler is checking the lifetimes at compile time. If I am right, Rust is the only language that has this concept. In this post, I will show you how to use lifetimes in functions, what doesn’t work, what not to do and what are the best practices.

Posted by Stefan Kecskes on Wednesday, January 31, 2024

Update Python on Ubuntu 22.04

Steps work also on Ubuntu 24.04

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. I know it, because I did that and I would like to save you some time and pain from restoring your system.

Posted by Stefan Kecskes on Friday, December 1, 2023

Using GPG key for Git commits on Linux

Today, we will use GPG for signing Git commits and tags in Git, so that we can verify that the commit or tag was made by you and not someone else. So to say that the code was not tampered with. This is a great way of making sure that the code you are working on is not modified by someone else without your knowledge.

Posted by Stefan Kecskes on Wednesday, November 29, 2023