Ubuntu 24.04

Common Problems 116604

Ubuntu 24.04 LTS – NGINX fails to start because port 80 is already in use – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 24 December 2024 Affected versions: Ubuntu 24.04 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 […]

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Common Problems 116552

Ubuntu 24.04 LTS – sshd fails to start after configuration change

🔴 Critical   ⏱ 5–30 min  Last verified: 24 December 2024 Affected versions: Ubuntu 24.04 LTS Ubuntu 24.04 Ubuntu 24.04.1 📖 ~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 […]

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Common Problems 116435

Ubuntu 24.04 LTS – DNS resolution fails with systemd-resolved – Fix & Prevention (FIX-PREVENTION-3)

🟠 High   ⏱ 5–30 min  Last verified: 24 December 2024 Affected versions: Ubuntu 24.04 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 […]

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Common Problems 116426

Ubuntu 24.04 LTS – Netplan apply fails from invalid YAML syntax – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 December 2024 Affected versions: Ubuntu 24.04 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 […]

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Ubuntu 24.04 — flatpak — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — flatpak — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 December 2024 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7046-1 Related CVEs: CVE-2024-42472 https://launchpad.net/bugs/2077087 Upstream summary: It was discovered that Flatpak incorrectly handled certain persisted directories. An attacker could possibly use this issue to read and write files in […]

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How to Install and Configure Xdebug 3 for PHP 8.3 on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Install CodeIgniter 4 on Ubuntu 24.04

CodeIgniter 4 is a lightweight, fast PHP framework ideal for developers who want a simple MVC structure without heavy overhead. This guide installs CodeIgniter 4 on Ubuntu 24.04 LTS with Nginx and PHP 8.3. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Nginx, PHP 8.3-FPM installed Composer installed Step 1 – […]

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Common Problems 116549

Ubuntu 24.04 LTS systemd Service Fails with Exit Code 203 EXEC

🟡 Medium   ⏱ 5–30 min  Last verified: 22 December 2024 📖 ~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 116496

Ubuntu 24.04 LTS – GRUB menu missing after update – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 22 December 2024 Affected versions: Ubuntu 24.04 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 […]

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Common Problems 116471

Bluetooth Devices Not Discoverable on Ubuntu 24.04 LTS

🟡 Medium   ⏱ 5–30 min  Last verified: 22 December 2024 Affected versions: 24.04 📖 ~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 […]

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Ubuntu 24.04 — tomcat9 — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — tomcat9 — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 21 December 2024 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7562-1 Related CVEs: CVE-2024-24549 CVE-2024-34750 CVE-2024-23672 CVE-2023-42795 CVE-2024-38286 CVE-2023-45648 CVE-2023-28708 CVE-2024-21733  +2 more Upstream summary: It was discovered that Tomcat did not include the secure attribute for session cookies when […]

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