Linux

Common Problems 121140

Debian 10 – Apache2 Fails with Address Already in Use – Port Conflict Resolution

🟠 High   ⏱ 5–30 min  Last verified: 28 May 2020 Affected versions: Debian 10 📖 ~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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Arch Linux — slock — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — slock — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201611-21 Related CVEs: CVE-2016-6866 Upstream summary: Type: access restriction bypass. Status: Fixed. Affected: 1.3-1. Fixed in: 1.4-2. Group: AVG-77. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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How To Set Up Mattermost on Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

How To Set Up Mattermost on Ubuntu 20.04

Mattermost is an open source collaboration and messaging platform created with security and configurability in mind providing comparable functionality to Discord or Slack. In this tutorial, you will set up the Mattermost Team Edition on your Ubuntu 20.04 server.

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How to Configure Blackbox Exporter for Endpoint Monitoring on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Blackbox Exporter for Endpoint Monitoring on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up configure blackbox exporter for endpoint monitoring on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step […]

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Arch Linux — libxcursor — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libxcursor — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201711-41 Related CVEs: CVE-2017-16612 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 1.1.14-1. Fixed in: 1.1.15-1. Group: AVG-531. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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SLES 12 — nodejs10 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — nodejs10 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 May 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2019:741-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-9511 CVE-2019-9513 Upstream summary: Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The […]

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SLES 15 — fence-agents — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — fence-agents — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 28 May 2020 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2019:1809-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-10153 Upstream summary: A flaw was discovered in fence-agents, prior to version 4.3.4, where using non-ASCII characters in a guest VM's comment or other fields […]

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Arch Linux — qutebrowser — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — qutebrowser — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201807-3 Related CVEs: CVE-2018-10895 CVE-2018-1000559 CVE-2020-11054 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 1.4.0-1. Fixed in: 1.4.1-1. Group: AVG-735. Table of contents Symptom & Impact Environment & Reproduction […]

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Common Problems 121204

Debian 10: OOM killer terminates Java service under memory pressure

🔴 Critical   ⏱ 5–30 min  Last verified: 27 May 2020 Affected versions: Debian 10 📖 ~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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