Kernel Drivers

How to Configure NTP Time Synchronization on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure NTP Time Synchronization on Debian 11

Introduction How to Configure NTP Time Synchronization 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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Common Problems 117044

Ubuntu 22.04 LTS Black Screen After NVIDIA Driver Update

🟡 Medium   ⏱ 5–30 min  Last verified: 14 May 2022 📖 ~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 & Cross-Refs References & Further […]

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Amazon Linux 2 — kernel-livepatch-4.14.219-161.340 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.219-161.340 — multiple vulnerabilities (3 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-2021-043 Related CVEs: CVE-2021-27363 CVE-2021-27364 CVE-2021-27365 Upstream summary: A flaw was found in the way access to sessions and handles was handled in the iSCSI driver in the Linux kernel. […]

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How to Set Up a Go Web Application on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up a Go Web Application on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying set up a go web application on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up a Go Web Application on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, […]

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

How to Configure dnsmasq on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure dnsmasq on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully and the resulting […]

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Amazon Linux 2 — kernel-livepatch-4.14.214-160.339 — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.214-160.339 — multiple vulnerabilities (5 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-2021-042 Related CVEs: CVE-2021-27363 CVE-2021-27364 CVE-2021-27365 CVE-2021-3347 CVE-2020-28374 Upstream summary: A flaw was found in the way access to sessions and handles was handled in the iSCSI driver in the […]

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How to Set Up SSH Two-Factor Authentication on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up SSH Two-Factor Authentication on CentOS Stream 9

Introduction How to Set Up SSH Two-Factor Authentication 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 […]

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How to Configure Mandatory Access Control on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Mandatory Access Control on FreeBSD 12

Introduction How to Configure Mandatory Access Control on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet […]

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How to Configure the System Timezone on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure the System Timezone on Debian 11

Introduction Deploying configure the system timezone on debian 11 on a Debian 11 Bullseye machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites You will […]

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

How to Configure ZFS on CentOS Stream 9

Introduction How to Configure ZFS 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 reproducible […]

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