Linux

How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up WireGuard VPN on Ubuntu 24.04

WireGuard is a modern, fast, and secure VPN protocol built into the Linux kernel. It is simpler to configure than OpenVPN and IPsec while offering superior performance. This guide sets up a WireGuard VPN server on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server with a public IP […]

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Common Problems 124115

Oracle Linux 10 – dnf-automatic timer saturates I/O during business hours

🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 2025 Affected versions: Oracle Linux 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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Common Problems 124102

Oracle Linux 10 – static routes disappear because nm-cloud-setup overwrites networking – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 2025 Affected versions: Oracle Linux 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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How to Install Neo4j on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Install Neo4j on CentOS Stream 10

Introduction Setting up install neo4j 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 Install Neo4j on CentOS Stream 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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Common Problems 124066

Oracle Linux 10 – SSH public key login denied by SELinux context mismatch – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 August 2025 Affected versions: Oracle Linux 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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Common Problems 116557

Ubuntu 24.04 LTS – filesystem remounts read-only after ext4 errors – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 8 August 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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Ubuntu 24.04 — 7zip — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — 7zip — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 August 2025 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7438-1 Related CVEs: CVE-2023-52168 CVE-2023-52169 Upstream summary: Igor Pavlov discovered that 7-Zip had several memory-related issues. An attacker could possibly use these issues to cause 7-Zip to crash, resulting in […]

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Common Problems 116523

Ubuntu 24.04 LTS – Microphone not detected in conferencing apps – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 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 Migrate Docker Compose to Podman Quadlet on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Migrate Docker Compose to Podman Quadlet on RHEL 10

Introduction This tutorial demonstrates how to Migrate Docker Compose to Podman Quadlet on RHEL 10 on RHEL 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 RHEL 10 system with the default […]

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Oracle Linux 9 — python3.12 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — python3.12 — vulnerability — patch and remediation guide (ELSA-2026-1408)

🟡 Medium   ⏱ 10–30 min  Last verified: 8 August 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-1408 Related CVEs: CVE-2025-12084 CVE-2025-13836 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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