CSS System Font Stack Reference
A reference to the sans serif system font stack you can use in your CSS to have pretty and easy to read text without having to download extra fonts.
How to Set Up LDAP with OpenLDAP on RHEL 7
How to Set Up LDAP with OpenLDAP on RHEL 7 OpenLDAP is the most widely deployed open-source implementation of the Lightweight Directory Access Protocol and serves as the foundation for centralized authentication, authorization, and user directory services across Linux environments. On RHEL 7, OpenLDAP is available directly from the base repositories and integrates tightly with […]
Ubuntu 16.04 LTS Apache Fails to Start Due to Port Conflict
🟡 Medium ⏱ 5–30 min Last verified: 19 May 2026 Affected versions: 16.04 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 & […]
Ubuntu 20.04 LTS – kubelet fails to start due to cgroup driver mismatch – Fix & Prevention
🟠 High ⏱ 5–30 min Last verified: 20 May 2026 Affected versions: Ubuntu 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 8 tuned Profile Not Applied After Reboot
🟡 Medium ⏱ 5–30 min Last verified: 20 May 2026 Affected versions: 8.5 8.6 8.7 8.8 8.9 8.10 📖 ~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 & […]
Amazon Linux 2 — kernel-livepatch-4.14.171-136.231 — multiple vulnerabilities (4 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read • Source: Amazon Linux advisory ALAS2LIVEPATCH-2020-011 Related CVEs: CVE-2020-12657 CVE-2020-10711 CVE-2020-10942 CVE-2020-8648 Upstream summary: An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.(CVE-2020-12657) Table of […]
FIPS Mode Enablement Causes Boot Or Crypto Failures
🟡 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 […]
firewalld Blocks Required 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 […]
How to Configure Apache2 MPM Worker on Debian 10
Introduction Deploying configure apache2 mpm worker on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure Debian […]
How to Install Deno 2 on Ubuntu 26.04
Deno 2 is a secure runtime for JavaScript and TypeScript built on V8 and Rust. Unlike Node.js, Deno has built-in TypeScript support, a permission-based security model, and a standard library without npm being required. Deno 2 introduces npm compatibility and improved backwards compatibility. This guide installs Deno 2 on Ubuntu 26.04 LTS. Tested and valid […]
