Improving Network Performance with Receive Packet Steering (RPS)
In modern systems, network performance can be limited by the host’s ability to handle packet processing, especially with a single receive queue. Receive Packet Steering (RPS) helps solve this issue by distributing incoming packets across multiple CPU cores, significantly improving performance. Proper configuration involves modifying system files related to the queues responsible for packet handling. […]
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How to find which folder under overlay2 directory belong to which container?
If you’ve been working with Docker, you might have wondered where Docker actually stores the filesystems of your containers on your host machine. This information can be crucial for various reasons, such as debugging, storage optimization, or general curiosity. Well, with a simple one-liner, you can get a neat list of all your containers along […]
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Route vs Ingress: Differences Between OKD and Kubernetes
If you’re involved in container management or developing applications in cloud environments, you’ve likely come across the terms “Route” in OpenShift (often referred to as OKD in its community version) and “Ingress” in Kubernetes. While both mechanisms serve similar functions, that is directing traffic to containerized applications, there are key differences between them. Here are […]
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Exploring Directories and Files Using Linux Commands
In the Linux environment, we have access to a range of powerful tools that allow us to effectively manage and search for files and directories. In this article, I will focus on two exemplary commands that enable us to find directories with a specific name and search files for a particular pattern. 1. Searching for […]
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Translating My CV into Code: A Journey from JSON to LaTeX
When it comes to managing and formatting a curriculum vitae (CV), traditional methods can sometimes feel limiting. In an attempt to find a flexible and tech-savvy solution, I embarked on a journey to translate my CV into code. Here’s what I discovered: Exploring JSON Resume My first experiment was with JSON Resume, a project that […]
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Windows 10 Doesn’t See Drives – Solving Installation Issues on Dell Precision T3600
Recently, I encountered a rather unusual problem while installing Windows 10 on a Dell Precision T3600 computer. During the installation process, the Windows installer was unable to identify any of the hard drives mounted in the computer. On the motherboard, there were two types of connectors: “HDD” and “SATA”, numbered from 0 to 2 and […]
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An Alternative to the ‘kubectl get all’ Command.
Have you ever wondered how to get a more detailed and complete view of resources in an OpenShift namespace? The standard oc get all command is helpful, but it is unable to display all the resources in namespaces, only returning a basic set of resource types. Today, I want to introduce you to an alternative […]
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Manually sending logs to stdout in a container.
When working with Docker containers, there may be times when you need to pass information to the Docker logging system. Although there are various methods to achieve this, one intriguing approach involves using the special /proc filesystem. The /proc directory is a unique area in Unix-like systems, containing information about running processes. For Docker containers, […]
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Managing Nodes in OpenShift Using oc adm
OpenShift, the container management platform created by Red Hat, offers powerful tools for managing nodes in your cluster. Today, we’re going to focus on a few key commands that will assist us in optimizing and maintaining our clusters. Managing Node Schedulability First off, sometimes we want to prevent new Pods from being placed on a […]
Read MoreDelete open files. When df and du show different results.
In Linux systems, files that have been deleted but are still open by some process can sometimes take up valuable disk space. Fortunately, there’s a way to handle this issue. Here’s a command that allows you to “clean” these files: Understanding what this command does requires breaking it down into parts. Let’s start from the […]
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