OpenVPN on Debian 8: 3 Best Secure Browsing Ways
A detailed legacy OpenVPN on Debian 8 guide covering full-tunnel browsing, DNS leak prevention, tls-auth hardening, certificate checks, firewall rules, and Jessie migration caveats.
How to Set Up System State Backup and Bare Metal Recovery on Windows Server 2022
Introduction to System State Backup on Windows Server 2022 System state backup is one of the most critical recovery capabilities on Windows Server 2022. Unlike a full volume backup, a system state backup captures the essential components that define the server’s identity and role — Active Directory Domain Services, the registry, boot files, COM+ class […]
OpenBSD 7.6 — pledge — errata 021_pledge — reliability fix — 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 021_pledge Errata topic: Reliability: pledge (All architectures) Issued: July 1, 2025 Upstream summary: TIOCUCNTL ioctl(2) could crash the kernel if called with a non-file argument. Table of contents Symptom & Impact […]
Windows Server 2022 — KB5019961 — security update — patch and remediation guide
🔴 Critical ⏱ 15–90 min Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read • Source: Microsoft KB5019961 • MSRC update-guide entry Related CVEs: CVE-2023-21712 Affected components: Windows Server 2022 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]
Windows Server 2022 — KB5027283 — multiple vulnerabilities (20 CVEs) — patch and remediation guide
🔴 Critical ⏱ 15–90 min Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read • Source: Microsoft KB5027283 • MSRC update-guide entry Related CVEs: CVE-2023-29363 CVE-2023-32014 CVE-2023-32015 CVE-2023-29346 CVE-2023-29351 CVE-2023-29355 CVE-2023-29358 CVE-2023-29359 +12 more Affected components: Windows Server 2022 Table of contents Symptom & Impact Environment & Reproduction Root […]
Oracle Linux 9 – Common Problem 010 – Diagnosis and Fix
🟡 Medium ⏱ 5–30 min Last verified: 19 May 2026 Affected versions: Oracle Linux 9 📖 ~3 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 […]
Ubuntu 20.04 LTS SSH Login Rejected With Permission Denied
🟠 High ⏱ 5–30 min Last verified: 19 May 2026 Affected versions: 20.04 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 & […]
RHEL 7 multipath devices missing after reboot
🟠 High ⏱ 5–30 min Last verified: 20 May 2026 Affected versions: RHEL 7 📖 ~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 & […]
How to Install Docker Engine on Oracle Linux 9
Introduction Setting up install docker engine on oracle linux 9 on a Oracle Linux 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Docker Engine on Oracle Linux 9, with all the commands you need, the SELinux and firewalld considerations to keep in […]
IBM AIX 7.3 — CVE-2022-22478 — vulnerability — patch and remediation guide
🟡 Medium ⏱ 15–45 min Last verified: 25 May 2026 Affected versions: IBM AIX 7.3 📖 ~4 min read • Source: NVD CVE-2022-22478, IBM Support Bulletin CVE: CVE-2022-22478 NVD summary: IBM Spectrum Protect Client 8.1.0.0 through 8.1.14.0 stores user credentials in plain clear text which can be read by a local user. IBM X-Force […]
