Kernel Drivers

How to Configure Jenkins Pipelines on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Jenkins Pipelines on Debian 9

Introduction This guide explains how to Configure Jenkins Pipelines on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with the standard […]

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How to Install Portainer on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install Portainer on Debian 11

Introduction This guide explains how to Install Portainer on Debian 11 on Debian 11 Bullseye. Debian Bullseye uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 11 install with the standard repositories […]

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How to Configure BGP Routing with BIRD on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure BGP Routing with BIRD on RHEL 8

Border Gateway Protocol (BGP) is the routing protocol that powers the internet, exchanging routing information between autonomous systems (AS). On RHEL 8, the BIRD Internet Routing Daemon provides a lightweight, production-grade BGP implementation available through the EPEL repository. This tutorial walks through installing BIRD, writing a BGP configuration with neighbor relationships and route filters, verifying […]

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How to Set Up Puppet Agent on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up Puppet Agent on CentOS Stream 9

Introduction How to Set Up Puppet Agent on CentOS Stream 9 on CentOS Stream 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration […]

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Common Problems 120638

Debian 11 – ext4 filesystem remounts read-only after I/O errors

🔴 Critical   ⏱ 5–30 min  Last verified: 18 April 2022 Affected versions: Debian 11 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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How to Install kubeadm and Set Up a Kubernetes Cluster on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install kubeadm and Set Up a Kubernetes Cluster on Debian 11

Introduction This guide explains how to Install kubeadm and Set Up a Kubernetes Cluster on Debian 11 on Debian 11 Bullseye. Debian Bullseye uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian […]

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Amazon Linux 2 — kernel-livepatch-5.10.68-62.173 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-5.10.68-62.173 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2021-073 Related CVEs: CVE-2021-4002 CVE-2021-43267 Upstream summary: A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory […]

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How to Set Up CentOS Stream 9 for High-Performance Computing — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up CentOS Stream 9 for High-Performance Computing

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying set up centos stream 9 for high-performance computing both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up CentOS Stream 9 for High-Performance Computing, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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How to Configure MySQL InnoDB Tuning on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure MySQL InnoDB Tuning on Debian 11

Introduction How to Configure MySQL InnoDB Tuning on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 11. […]

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How to Configure Kibana Dashboards on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Kibana Dashboards on CentOS Stream 9

Introduction How to Configure Kibana Dashboards on CentOS Stream 9 on CentOS Stream 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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