December 2020 - Page 3 of 69

How to Use the CSS Box Model – CSS Tutorial 2025–2026

How to Use the CSS Box Model – CSS Tutorial 2025–2026

Learning how to use the CSS box model is one of the most fundamental and frequently used skills in any CSS tutorial for beginners — every single visible HTML element on the web is a box, and the CSS box model determines how content, padding, border, and margin work together to control size, spacing, and layout. Mastering the CSS box model lets you precisely adjust element dimensions, create consistent spacing, build cards, sections, grids, and responsive designs without surprises or broken layouts. In this guide, you’ll explore each layer of the CSS box model (content → padding → border → margin), adjust their values hands-on, and understand margin collapse using your css-practice project

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Oracle Linux 8 — git-lfs — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — git-lfs — security and stability fixes — required update (ELSA-2022-7129)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7129 Related CVEs: CVE-2022-30630 CVE-2022-1705 CVE-2022-27664 CVE-2022-30635 CVE-2020-28851 CVE-2020-28852 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Ubuntu 20.04 — elfutils — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — elfutils — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6322-1 Related CVEs: CVE-2018-16062 CVE-2018-16403 CVE-2018-18310 CVE-2018-18520 CVE-2018-18521 CVE-2019-7149 CVE-2019-7150 CVE-2019-7665  +2 more Upstream summary: It was discovered that elfutils incorrectly handled certain malformed files. If a user or automated […]

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Common Problems 121601

Debian 9 – Severe Clock Drift Breaks TLS and Kerberos – Chrony Stabilization

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 📖 ~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 117579

Ubuntu 20.04 GRUB menu missing 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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Common Problems 115945

No Audio Output with PipeWire/Pulse Compatibility

🟡 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 […]

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Ubuntu 16.04 — drupal7 — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — drupal7 — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7658-1 Related CVEs: CVE-2020-11023 CVE-2020-11022 CVE-2020-13671 CVE-2020-28948 CVE-2020-28949 CVE-2015-2559 CVE-2015-2749 CVE-2015-2750  +2 more Upstream summary: It was discovered that Drupal incorrectly parsed untrusted HTML. A remote attacker could possibly use […]

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Common Problems 115607

yum Hangs Behind Proxy Due to SSL Inspection

🟡 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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How to Set Up Spinnaker on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up Spinnaker on SLES 12

Introduction This tutorial covers How to Set Up Spinnaker on SLES 12 on SLES 12. SLES 12 (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. Prerequisites Ensure your SLES 12 system is up to date: zypper refresh […]

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