Open Source, Linux and Business
journalctl is a great tool to read and filter logs. Since it is context aware, it is much easier to use compared to just using tail on text files. It can be super helpful for example to filter output given on a specific service. But how do you combine filters with a logical OR? Today Continue reading "[Short Tip] Get combined journal entries for multiple systemd services and Kernel messages"
When working with larger data structures in Nushell, there are often tables that are wider than the terminal has width, resulting in some columns truncated, indicated by the three dots .... But how can we expand the dots? The answer is simple, but surprisingly, not easily found. The Working with tables documentation of Nushell weirdly Continue reading "[Short Tip] Get all columns in a table in…
For a test I recently had to process a plain list of items that was outputted by a program. In Bash, the usual way to do so is: But how could this be done in Nushell? Just using the same command gives an error: Instead, the trick is to tell Nushell to read the input Continue reading "[Short Tip] Processing line by line in a loop in Nushell"
Nushell is becoming a more and more serious shell every day. One thing missing in the past was the capability to create and use Python virtual environments. This has changed: Nushell was added as another supported shell in the virtualenv package: However, there is one catch: the source command does not work when you try Continue reading "[Short Tip] Using a Python virtual environment in Nushell"
Recently I realized that one of the disks in my server had died. After the replacement, the RAID sync started and I quickly had to learn that this was going to take days (!). But I also learned that the time it might take massively jumped up and down. Thus I thought it would Continue reading "[Short Tip] Plot live-data in Linux terminal"
After I learned how subshells can be executed within nushell I was confident that I could handle that part. But few minutes ago I run into an error I didn t really understand: I thought the parameter was provided somehow in the wrong way, and put it into quotes: "dwebp". But it didn t help. I tested Continue reading "[Short Tip] Accessing tabular nushell output for non-nushell commands"
Containers are meant to keep processes contained. But there are ways to gather information about the host like the actual execution environment you are running in. Containers are pretty good at keeping everyone and everything inside their boundaries thanks to SELinux, namespaces and so on. But they are not perfect. Thanks to a Continue reading "Figuring out the container runtime you are in"
Cilium is a networking plugin for Kubernetes based on eBPF. If you want to give it a try, Minikube is a good option to get started. Background I just started with Isovalent and since I am very much a beginner regarding everything related to Kubernetes I decided to get some hands-on experience with the Continue reading "[Howto] Installing Cilium with Minikube on Fedora"
As mentioned in my last post I left Red Hat and today is my first day at Isovalent! In my new position I will be a technical marketing manager and thus working on technical content, messaging and enablement. With Cilium Enterprise Isovalent offers an eBPF based solution for Kubernetes networking, observability, and security Continue reading "Hello Isovalent!"
Over 6 years ago I joined Red Hat. For me it was a huge step going from a small SI to a large software vendor, moving to a dedicated pre-sales role ( Solution Architect ) in a larger team, and so on. And I learned a lot. Like, A LOT. About how such a large enterprise Continue reading "Good bye Red Hat"