Linux

Oracle Linux 9 — cockpit: Unauthenticated remote code execution due to SSH command-line argument injection — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — cockpit: Unauthenticated remote code execution due to SSH command-line argument injection

🔴 Critical   ⏱ 15–90 min  Last verified: 22 December 2024 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-7384 Related CVEs: CVE-2026-4631 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Configure XFS on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Configure XFS on CentOS Stream 10

Introduction This tutorial demonstrates how to Configure XFS on CentOS Stream 10 on CentOS Stream 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 10 system with the default AppStream […]

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Common Problems 120113

Debian 12 – filesystem errors remount root as read-only

🔴 Critical   ⏱ 5–30 min  Last verified: 22 December 2024 Affected versions: Debian 12 📖 ~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 117002

Ubuntu 22.04 SSH connection refused

🟡 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 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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How to Configure Node Exporter on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Configure Node Exporter on CentOS Stream 10

Introduction Setting up configure node exporter on centos stream 10 on a CentOS Stream 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure Node Exporter on CentOS Stream 10, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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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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openSUSE Tumbleweed — python310-Scrapy — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python310-Scrapy — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2024-1968 Upstream summary: In scrapy/scrapy, an issue was identified where the Authorization header is not removed during redirects that only change the scheme (e.g., HTTPS […]

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Alpine Linux 3.20 — libupnp — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — libupnp — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 1.12.1-r1 📖 ~4 min read  •  Source: Alpine secdb entry — libupnp 1.12.1-r1 Related CVEs: CVE-2020-13848 Upstream summary: Alpine community repository for vv3.20 ships libupnp 1.12.1-r1 which addresses CVE-2020-13848. Table of contents Symptom & Impact Environment […]

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Ubuntu 16.04 — twisted — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — twisted — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 22 December 2024 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6988-1 Related CVEs: CVE-2024-41671 CVE-2024-41810 CVE-2022-21716 CVE-2019-12387 CVE-2019-12855 CVE-2019-9512 CVE-2019-9514 CVE-2019-9515  +3 more Upstream summary: Ben Kallus discovered that Twisted incorrectly handled response order when processing multiple HTTP requests. A […]

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