sirmusera

sirmusera

I’m a Linux Certified Engineer with a deep passion for open-source technologies and a strong foundation in Linux systems. My expertise spans system administration, infrastructure automation, and performance optimization. With hands-on experience in DevOps practices, I focus on streamlining deployments, improving system reliability, and integrating CI/CD pipelines to support scalable, efficient workflows. https://www.linkedin.com/in/musera-isaac/

Why Your Linux System Boots into grub rescue> and How to Fix It 0

It can be deeply frustrating when a Linux system fails to boot properly and drops into a grub rescue> prompt. This usually indicates a problem with the GRUB (GRand Unified Bootloader), the software responsible for booting the OS. This guide will help you understand why this happens and how to recover your system—even if you’re using RHEL 7, 8, 9, or 10

How to Configure HTPasswd Authentication on an OpenShift Cluster 0

In this step-by-step guide, we will configure HTPasswd authentication on an existing OpenShift 4.15+ single-node cluster. We’ll create user accounts, update the cluster’s OAuth settings to use HTPasswd, and verify access via both the CLI and the web console. We’ll also cover how to assign admin privileges to a new user and remove the default kubeadmin user for security.

Installing and Using n8n on RHEL 9/CentOS with Docker 0
- Best Practices & Patterns, DevOps Tools, Job Automation, Linux Basics, Networking, System Administration, Web Servers
- August 8, 2025
This guide will walk you through installing Docker on Red Hat Enterprise Linux 9 (or CentOS/Rocky/AlmaLinux 9), setting up n8n in a Docker container, and configuring SSL/HTTPS for secure access. We’ll use step-by-step instructions with explanations, sample commands, and outputs.
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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. Deploy. Scale — The Linux Way

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