Kernel Drivers

NetBSD 9.4 — xenkernel33 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — xenkernel33 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • October 19, 2023
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2011-1166 CVE-2011-2901 Upstream summary: pkgsrc audit-packages flagged xenkernel33<3.3.2nb1 for vulnerability class 'denial-of-service'. Reference: http://secunia.com/advisories/42395/ Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step […]

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How to Configure Btrfs Snapshots on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Btrfs Snapshots on Oracle Linux 9

Introduction Oracle Linux 9 ships with a stable, security-hardened base that makes deploying configure btrfs snapshots on oracle linux 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Btrfs Snapshots on Oracle Linux 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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NetBSD 9.4 — xentools-hvm — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — xentools-hvm — vulnerability — patch and remediation guide

  • October 19, 2023
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Upstream summary: pkgsrc audit-packages flagged xentools{3,30}-hvm<=3.1.0 for vulnerability class 'remote-code-execution'. Reference: http://secunia.com/advisories/26986/ Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

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How to Install and Configure ISC DHCP Server on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install and Configure ISC DHCP Server on Debian 12

  • October 19, 2023
  • Linux
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Introduction This guide explains how to Install and Configure ISC DHCP Server on Debian 12 on Debian 12 Bookworm. Debian Bookworm 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 12 install […]

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Common Problems 120174

Debian 12 High CPU from Kswapd and Memory Pressure

  • October 18, 2023
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 18 October 2023 Affected versions: Debian 12 📖 ~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 MongoDB on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install MongoDB on Debian 12

  • October 18, 2023
  • Linux
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Introduction This guide explains how to Install MongoDB on Debian 12 on Debian 12 Bookworm. Debian Bookworm 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 12 install with the standard repositories […]

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How to Configure Mandatory Integrity Control on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Mandatory Integrity Control on CentOS Stream 9

  • October 17, 2023
  • CentOS
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Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure mandatory integrity control on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Mandatory Integrity Control on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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How to Install Go 1.22 on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install Go 1.22 on Debian 12

  • October 17, 2023
  • Linux
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Introduction How to Install Go 1.22 on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm 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 12. This […]

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Common Problems 120142

Debian 12 – PostgreSQL Fails Because WAL Partition Is Full – Immediate Recovery

  • October 17, 2023
  • Linux
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🔴 Critical   ⏱ 5–30 min  Last verified: 17 October 2023 Affected versions: Debian 12 📖 ~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 Configure Apache with mod_pagespeed on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Apache with mod_pagespeed on Oracle Linux 9

Introduction Oracle Linux 9 ships with a stable, security-hardened base that makes deploying configure apache with mod_pagespeed on oracle linux 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Apache with mod_pagespeed on Oracle Linux 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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