Kernel Drivers

Common Problems 121161

Debian 10 – Docker overlay2 No Space Left on Device – Host Cleanup Playbook

🟠 High   ⏱ 5–30 min  Last verified: 11 July 2020 Affected versions: Debian 10 📖 ~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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Common Problems 113074

Windows Server 2016 — AD orphaned object cleanup needed after failed domain controller removal — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 11 July 2020 Affected versions: Windows Server 2016 📖 ~2 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 Set Up Unbound DNS Resolver on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up Unbound DNS Resolver on FreeBSD 12

Introduction How to Set Up Unbound DNS Resolver 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 […]

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Common Problems 112958

Windows Server 2016 – MPIO path failover stalls due to HBA driver defects – Fix and Prevention

🟠 High   ⏱ 5–30 min  Last verified: 10 July 2020 Affected versions: Windows Server 2016 📖 ~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 and Configure Varnish Cache on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install and Configure Varnish Cache on Debian 9

Introduction How to Install and Configure Varnish Cache on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 […]

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Common Problems 118043

Python pip SSL Certificate Verify Failed

🟡 Medium   ⏱ 5–30 min  Last verified: 9 July 2020 📖 ~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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How to Configure OpenVAS Vulnerability Scanner on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure OpenVAS Vulnerability Scanner on Debian 10

Introduction This guide explains how to Configure OpenVAS Vulnerability Scanner on Debian 10 on Debian 10 Buster. Debian Buster 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 10 install with the […]

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Amazon Linux 2 — kernel-livepatch-4.14.198-152.320 — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.198-152.320 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2020-030 Related CVEs: CVE-2020-25284 Upstream summary: A flaw was found in the capabilities check of the rados block device functionality in the Linux kernel. Incorrect capability checks could alllow a […]

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Common Problems 119044

Ubuntu 14.04 LTS Swap Exhaustion Causes OOM Kills

🟡 Medium   ⏱ 5–30 min  Last verified: 8 July 2020 📖 ~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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How to Install and Configure GraalVM on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Configure GraalVM on Debian 10

Introduction How to Install and Configure GraalVM on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster 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 10. […]

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