ubuntu

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 Harden PHP 8.3 on Ubuntu 24.04

Default PHP settings expose version information, allow dangerous functions, and leave logging disabled. This guide hardens PHP 8.3 on Ubuntu 24.04 LTS to protect production web applications. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server with PHP 8.3 installed A user with sudo privileges Step 1 – Disable Version Exposure Open […]

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Common Problems 116513

Ubuntu 24.04 LTS – No audio output with PipeWire active – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 29 October 2025 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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How to Configure a Static IP Address with Netplan on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Install and Configure Traefik Reverse Proxy on Ubuntu 24.04

Traefik is a modern, cloud-native reverse proxy and load balancer that automatically discovers services and configures routing. It integrates natively with Docker, Kubernetes, and other orchestrators. This guide installs Traefik on Ubuntu 24.04 LTS with Docker. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Docker Engine and Docker Compose installed A […]

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

How to Install a LAMP Stack on Ubuntu 24.04

The LAMP stack — Linux, Apache, MySQL, and PHP — powers millions of web sites. This guide installs and integrates all four components on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges UFW firewall configured Step 1 – Install Apache Install and enable […]

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Ubuntu 20.04 — apport — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — apport — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 28 October 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7545-4 Related CVEs: https://launchpad.net/bugs/2117236 https://launchpad.net/bugs/2112466 https://launchpad.net/bugs/2112272 CVE-2025-5054 CVE-2023-1326 https://launchpad.net/bugs/2016023 CVE-2021-3899 CVE-2022-1242  +12 more Upstream summary: USN-7545-1 fixed vulnerabilities in Apport. The update incorrectly handled logging if a crashing process was […]

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Ubuntu 24.04 — fossil — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — fossil — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 27 October 2025 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6770-1 Related CVEs: https://launchpad.net/bugs/2064509 Upstream summary: USN-6729-1 fixed vulnerabilities in Apache HTTP Server. The update lead to the discovery of a regression in Fossil with regards to the handling of […]

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Ubuntu 18.04 — node-cipher-base — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — node-cipher-base — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 27 October 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7746-1 Related CVEs: CVE-2025-9287 Upstream summary: Nikita Skovoroda discovered that cipher-base did not properly manage certain inputs. An attacker could possibly use this issue to manipulate the internal state of […]

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Ubuntu 20.04 — linux-gcp-5.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux-gcp-5.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 27 October 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8297-1 Related CVEs: CVE-2023-2640 CVE-2023-32629 CVE-2023-53421 CVE-2023-53520 CVE-2023-53662 CVE-2023-54207 CVE-2025-38057 CVE-2025-38125  +12 more Upstream summary: Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux […]

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Common Problems 116997

Ubuntu 22.04 NGINX Fails to Start Due to Port 80 Conflict

🟡 Medium   ⏱ 5–30 min  Last verified: 26 October 2025 📖 ~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 116609

Ubuntu 24.04 LTS OpenSSH Host Key Changed Alert After Rebuild

🟡 Medium   ⏱ 5–30 min  Last verified: 26 October 2025 📖 ~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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