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Common Problems 123971

Oracle Linux 10 – DNF metadata download fails behind proxy with Curl error 28 – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 12 October 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 Set Up WireGuard VPN on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Set Up WireGuard VPN on Debian 13

Introduction This guide explains how to Set Up WireGuard VPN on Debian 13 on Debian 13 Trixie. Debian Trixie uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 13 install with the […]

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How to Enable HTTPS with Let's Encrypt on Apache2 Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Enable HTTPS with Let’s Encrypt on Apache2 Debian 13

Introduction Debian 13 Trixie is built around the ethos of stability and free software. Setting up enable https with let’s encrypt on apache2 debian 13 on Trixie leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Trixie freeze. Follow each step […]

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Oracle Linux 8 — pam — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — pam — vulnerability — patch and remediation guide (ELSA-2025-10027)

🟠 High   ⏱ 15–60 min  Last verified: 12 October 2025 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-10027 Related CVEs: CVE-2025-6020 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 Schedule Jobs with cron on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Schedule Jobs with cron on Debian 13

Introduction How to Schedule Jobs with cron on Debian 13 is a fundamental operation for any administrator maintaining a Debian 13 Trixie server. Debian 13 Trixie ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. […]

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Common Problems 127042

CentOS Stream 10 – Common Problem 133 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 11 October 2025 Affected versions: CentOS Stream 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 Automate Oracle Linux 10 with Ansible — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Automate Oracle Linux 10 with Ansible

Introduction This tutorial demonstrates how to Automate Oracle Linux 10 with Ansible on Oracle Linux 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 Oracle Linux 10 system with the default AppStream […]

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How to Configure Apache mod_proxy on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Configure Apache mod_proxy on Oracle Linux 10

Introduction This tutorial demonstrates how to Configure Apache mod_proxy on Oracle Linux 10 on Oracle Linux 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 Oracle Linux 10 system with the default […]

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How to Automate Debian 13 Server Provisioning with Ansible — step-by-step Debian 13 tutorial on Progressive Robot

How to Automate Debian 13 Server Provisioning with Ansible

Introduction How to Automate Debian 13 Server Provisioning with Ansible is a fundamental operation for any administrator maintaining a Debian 13 Trixie server. Debian 13 Trixie ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. […]

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Common Problems 114081

RHEL 10 – shared library resolution failures after custom install path changes – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 11 October 2025 Affected versions: RHEL 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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