How To Deploy a Rails App with Passenger and Nginx on Ubuntu 14.04
Deploy your Rails application with Passenger and Nginx on Ubuntu 14.04.
How to Use tmux for Terminal Multiplexing on RHEL 7
How to Use tmux for Terminal Multiplexing on RHEL 7 Every Linux administrator has experienced the frustration of losing a long-running process because an SSH connection dropped. tmux (terminal multiplexer) solves this problem by running your terminal sessions inside a persistent server process that survives disconnections. Beyond persistence, tmux allows you to split a single […]
Alpine Linux edge — freeimage — multiple vulnerabilities (2 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 3.18.0-r2 📖 ~4 min read • Source: Alpine secdb entry — freeimage 3.18.0-r2 Related CVEs: CVE-2019-12211 CVE-2019-12213 Upstream summary: Alpine community repository for vedge ships freeimage 3.18.0-r2 which addresses CVE-2019-12211. Table of contents Symptom & Impact […]
RHEL 8 firewalld Zone Mismatch Blocks Application Port
🟡 Medium ⏱ 5–30 min Last verified: 19 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 […]
openSUSE Tumbleweed — lightdm — multiple vulnerabilities (4 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2011-3349 CVE-2011-3153 CVE-2011-4105 CVE-2012-1111 Upstream summary: lightdm before 0.9.6 writes in .dmrc and Xauthority files using root permissions while the files are in user controlled […]
RHEL 10 – kdump does not capture vmcore on panic because crashkernel is mis-sized – Fix & Prevention
🔴 Critical ⏱ 5–30 min Last verified: 20 May 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]
How to Install PostgreSQL on SLES 15
Introduction This tutorial covers How to Install PostgreSQL on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Install PostgreSQL zypper install -y postgresql-server postgresql Step 2 — […]
FreeBSD 12 — poppler — multiple vulnerabilities (7 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: poppler — multiple denial of service issues Related CVEs: CVE-2007-3387 CVE-2007-4352 CVE-2007-5392 CVE-2007-5393 CVE-2008-2950 CVE-2017-9775 CVE-2017-9865 Upstream summary: Poppler developers report: Poppler is prone to a stack-based buffer-overflow vulnerability. Successful […]
Windows Server 2012 R2 — Cluster Service (ClusSvc) quorum startup failure — Fix & Prevention
🟠 High ⏱ 5–30 min Last verified: 04 May 2027 Affected versions: Windows Server 2012 R2 📖 ~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 […]
FreeBSD 12 — php4-shmop — multiple vulnerabilities (8 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: php — multiple vulnerabilities Related CVEs: CVE-2007-0905 CVE-2007-0906 CVE-2007-0907 CVE-2007-0908 CVE-2007-0909 CVE-2007-0910 CVE-2007-0988 CVE-2007-1001 Upstream summary: The PHP development team reports: Security Enhancements and Fixes in PHP 5.2.2 and PHP […]
