Networking

Common Problems 115515

RHEL 7 Network Scripts Conflict With NetworkManager

🟡 Medium   ⏱ 5–30 min  Last verified: 27 June 2020 Affected versions: RHEL 7 📖 ~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 115416

RHEL 7 firewalld Blocking Internal Application Port

🟠 High   ⏱ 5–30 min  Last verified: 27 June 2020 Affected versions: RHEL 7 📖 ~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 auditd System Auditing on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure auditd System Auditing on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure auditd system auditing on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully and […]

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How to Use Podman on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use Podman on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use podman on ibm aix 7.2 on IBM AIX […]

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How to Configure Apache2 Virtual Hosts on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Apache2 Virtual Hosts on Debian 10

Introduction Deploying configure apache2 virtual hosts on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before you […]

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How to Install and Use Skopeo for Container Image Management on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install and Use Skopeo for Container Image Management on RHEL 8

Skopeo is a command-line tool for working with container images and registries without requiring a running container daemon. On RHEL 8 it is available directly from the default repositories, making it one of the easiest container tools to install and use. Unlike Docker CLI, Skopeo can inspect, copy, sync, and delete images across registries without […]

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Common Problems 115392

yum fails with Cannot retrieve metalink

🟡 Medium   ⏱ 5–30 min  Last verified: 26 June 2020 📖 ~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 LVM Thin Provisioning on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure LVM Thin Provisioning on Debian 10

Introduction This guide explains how to Configure LVM Thin Provisioning on Debian 10 on Debian 10 Buster. Debian Buster 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 10 install with the […]

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Common Problems 115507

yum Metadata Expired and Repositories Stay Stale

🟡 Medium   ⏱ 5–30 min  Last verified: 25 June 2020 📖 ~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 114958

RHEL 8 Static Routes Disappear After Reboot With NetworkManager

🟡 Medium   ⏱ 5–30 min  Last verified: 25 June 2020 📖 ~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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