January 2023 - Page 49 of 72

How to Configure IPv6 Dual-Stack Networking on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure IPv6 Dual-Stack Networking on RHEL 8

IPv6 adoption has accelerated as IPv4 address exhaustion becomes more acute, and most modern Linux servers must support both protocols simultaneously in a dual-stack configuration. RHEL 8 ships with full IPv6 support in the kernel and in NetworkManager, making dual-stack setup straightforward with nmcli. Firewalld and the major web servers handle IPv6 natively once the […]

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Amazon Linux 2 — python-wheel — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — python-wheel — 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 ALAS2-2023-2362 Related CVEs: CVE-2022-40898 Upstream summary: An issue discovered in Python Packaging Authority (PyPA) Wheel 0.37.1 and earlier allows remote attackers to cause a denial of service via attacker controlled […]

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OpenBSD 7.6 — xserver — errata 020_xserver — security advisory — syspatch and remediation — diagnosis and fix on OpenBSD 7.6

OpenBSD 7.6 — xserver — errata 020_xserver — security advisory — syspatch and remediation

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.6 📖 ~4 min read  •  Source: OpenBSD 7.6 errata 020_xserver Errata topic: Security: xserver (All architectures) Issued: July 1, 2025 Related CVEs: CVE-2025-49176 Upstream summary: Previous fix for X11 server was incomplete. CVE-2025-49176 Table of contents Symptom & Impact Environment […]

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Common Problems 117033

Ubuntu 22.04 LTS – swap does not activate after reboot – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 22.04 LTS 📖 ~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 114619

High CPU Usage by systemd-journald on Busy Hosts

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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FreeBSD 12 — element-web — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — element-web — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: element-web — several vulnerabilities Related CVEs: CVE-2021-40823 CVE-2021-40824 CVE-2022-36059 CVE-2022-36060 CVE-2022-39236 CVE-2022-39249 CVE-2022-39250 CVE-2022-39251  +8 more Upstream summary: Element team reports: Versions of Element Web and Desktop earlier than 1.11.85 […]

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Common Problems 114600

System Boots to GRUB Rescue After Update

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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