System Administration

Linux Active Directory Integration with SSSD, SSH, and PAM – Guide 0
- Best Practices & Patterns, Linux Basics, Security & Hardening, System Administration, Troubleshooting
- August 5, 2025
By following these practices and understanding the components, you will have a robust setup where Linux and Active Directory work together for seamless user authentication. The key is to verify each piece (DNS, Kerberos, SSSD, PAM) and use the tools available (logs, realm commands, sssctl, etc.) to diagnose issues. With proper configuration, domain users can log into Linux systems using their AD accounts, and administrators can centrally manage credentials and policies in AD while maintaining Linux-specific settings via SSSD.
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Automate RHEL 9 and CentOS Stream 9 Installation on KVM Using Kickstart 0
- Infrastructure as Code, Job Automation, Linux Basics, Shell Scripting, System Administration, Virtualization, Web Servers
- July 23, 2025
Automating OS installations can save time and ensure consistency, especially when deploying multiple virtual machines. Kickstart is a tool from Red Hat that allows you to automate the installation of RHEL and its derivatives by providing a file with answers to all the installation prompts. In this guide, we’ll walk through a beginner-friendly step-by-step process to automate the installation of Red Hat Enterprise Linux 9 and CentOS Stream 9 on KVM using Kickstart. We assume you already have KVM (via libvirt/QEMU) installed and configured on your host system.
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Running DeepSeek on Linux: A Step-by-Step Guide 1
- AI, Linux Basics, System Administration, Virtualization, Web Servers
- June 12, 2025
This guide shows how to install and run DeepSeek on Ubuntu or RHEL/CentOS using the simplest methods (Docker or prebuilt binaries). You’ll learn to download the model, run a prompt, and verify output.
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Microsoft Open-Sources WSL 3: A New Chapter for Windows/Linux Developers 0
- Linux Basics, System Administration, Web Servers
- June 11, 2025
Microsoft has just announced a milestone: the Windows Subsystem for Linux (WSL) is now open-source. At Build 2025, the company confirmed that the WSL codebase has been published on GitHub, allowing anyone to download, build, and modify it. In the official announcement, Microsoft wrote “the code that powers WSL is now available on GitHub … and open sourced to the community”.
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Managing Storage Space in Your OpenShift Cluster 0
- CI/CD Pipelines, Cloud Platforms, Containers & Docker, DevOps Tools, Kubernetes, Linux Basics, System Administration, Virtualization
- June 10, 2025
Keeping disk pressure under control is a day-to-day chore for cluster admins. Left unchecked, old container images, completed builds, logs and stray volumes will quietly eat through node storage and the internal registry PVC, eventually triggering pod evictions or broken pushes. This post walks through a layered strategy for reclaiming and preventing waste—starting with the integrated image registry and ending with node-level log rotation.
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Argo CD and GitOps: Setting Up Continuous Delivery on a Kubernetes Cluster 0
- CI/CD Pipelines, Containers & Docker, DevOps Tools, Job Automation, Kubernetes, Linux Basics, System Administration, Version Control (Git)
- June 10, 2025
Argo CD is an open-source GitOps continuous delivery tool for Kubernetes. In GitOps, all deployment manifests live in a Git repo as the source of truth. Argo CD continuously monitors the Git repo and the Kubernetes cluster, and automatically (or manually) syncs the live state to match the desired state in Git. It also provides a web-based UI to see “desired vs live” status of your applications. In this tutorial, we’ll install Argo CD on a local Minikube cluster, access the Argo CD web UI, and deploy a sample GitOps application (a simple NGINX example) from a public repository.
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