ubuntu

How to Secure Nginx with Let's Encrypt SSL on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Configure Nginx as a Reverse Proxy on Ubuntu 24.04

A reverse proxy sits in front of one or more backend application servers, forwarding client requests and returning responses. Nginx makes an excellent reverse proxy — lightweight, fast, and easy to configure. This guide sets up Nginx as a reverse proxy on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 […]

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Common Problems 116555

Ubuntu 24.04 LTS – SSH key authentication denied – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 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 116447

Ubuntu 24.04 LTS – apt HTTPS fails due to clock skew – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 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 20.04 — golang-1.21 — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — golang-1.21 — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 1 December 2024 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6886-1 Related CVEs: CVE-2023-45288 CVE-2023-45289 CVE-2023-45290 CVE-2024-24783 CVE-2024-24784 CVE-2024-24785 CVE-2024-24788 CVE-2024-24789  +8 more Upstream summary: It was discovered that the Go net/http module did not properly handle the requests when […]

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Common Problems 116545

Ubuntu 24.04 LTS – CUPS print jobs stuck in queue – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 30 November 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 116494

Ubuntu 24.04 LTS – Wi-Fi adapter missing due to firmware not loaded – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 30 November 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 — trafficserver — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — trafficserver — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 30 November 2024 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8050-1 Related CVEs: CVE-2024-50305 Upstream summary: Masakazu Kitajo discovered that Apache Traffic Server did not properly handle the Valid Host header field. An attacker could possibly use this issue to […]

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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 and Configure Laravel 11 with Nginx on Ubuntu 24.04

Laravel 11 is the latest major version of the popular PHP framework, introducing a streamlined skeleton, the new Reverb WebSocket server, and improved Eloquent features. This guide deploys a Laravel 11 application with Nginx and PHP 8.3 on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Nginx, PHP […]

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Ubuntu 18.04 — exim4 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — exim4 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 29 November 2024 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6939-1 Related CVEs: CVE-2024-39929 CVE-2021-38371 CVE-2023-51766 CVE-2023-42117 CVE-2023-42119 CVE-2023-42114 CVE-2023-42115 CVE-2023-42116  +12 more Upstream summary: Phillip Szelat discovered that Exim misparses multiline MIME header filenames. A remote attacker could use […]

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Ubuntu 20.04 — runc — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — runc — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 29 November 2024 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6619-1 Related CVEs: CVE-2024-21626 CVE-2023-25809 CVE-2023-27561 CVE-2023-28642 CVE-2021-30465 Upstream summary: Rory McNamara discovered that runC did not properly manage internal file descriptor while managing containers. An attacker could possibly use […]

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