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How To Apply CSS Styles to HTML with Cascade and Specificity — step-by-step DevOps tutorial on Progressive Robot

How To Apply CSS Styles to HTML with Cascade and Specificity

Cascading Style Sheets, better known as CSS, is the language for visual style and design on the web. With it, you can apply styles directly to Hypertext Markup Language (HTML) to lay out a webpage, adjust font and color, create complex animations, and much more. This tutorial will focus on applying CSS to HTML, cascade, and specificity, which are foundational aspects of CSS and will prepare you for using CSS effectively in your web projects.

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How to Configure Docker with a Non-Root User on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Docker with a Non-Root User on Debian 9

Introduction This guide explains how to Configure Docker with a Non-Root User on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install […]

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Oracle Linux 8 — go-toolset:ol8 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — go-toolset:ol8 — security and stability fixes — required update (ELSA-2021-5160)

🟠 High   ⏱ 15–60 min  Last verified: 13 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-5160 Related CVEs: CVE-2021-44716 CVE-2021-44717 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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FreeBSD 13 — chocolate-doom — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — chocolate-doom — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: chocolate-doom — Arbitrary code execution Related CVEs: CVE-2020-14983 Upstream summary: Michal Dardas from LogicalTrust reports: The server in Chocolate Doom 3.0.0 and Crispy Doom 5.8.0 doesn't validate the user-controlled num_players […]

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Common Problems 121661

Debian 9 – Docker overlay2 No Space Left on Device – Host Cleanup Playbook

🟠 High   ⏱ 5–30 min  Last verified: 13 July 2021 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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FreeBSD 13 — squidclamav — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — squidclamav — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: squidclamav — cross-site scripting in default virus warning pages Related CVEs: CVE-2012-3501 CVE-2012-4667 Upstream summary: SquidClamav developers report: This release fix several security issues by escaping CGI parameters. Prior to […]

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How to Install phpMyAdmin on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install phpMyAdmin on FreeBSD 13

Introduction Deploying install phpmyadmin on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + […]

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Common Problems 115638

Kernel Updated But Old Kernel Still Running – RHEL 7 Post 140

🟡 Medium   ⏱ 5–30 min  Last verified: 13 July 2021 📖 ~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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AlmaLinux 8 — nmap — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — nmap — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:4306 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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FreeBSD 13 — ja-openoffice — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — ja-openoffice — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: openoffice — DOC document heap overflow vulnerability Related CVEs: CVE-2004-0752 CVE-2005-0941 Upstream summary: AD-LAB reports that a heap-based buffer overflow vulnerability exists in OpenOffice's handling of DOC documents. When reading […]

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