Boot Startup

Oracle Linux 10 — grub2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — grub2 — vulnerability — patch and remediation guide (ELSA-2026-4649)

🟡 Medium   ⏱ 10–30 min  Last verified: 13 January 2026 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-4649 Related CVEs: CVE-2025-61662 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 the Hostname and Timezone on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure the Hostname and Timezone on RHEL 10

Introduction How to Configure the Hostname and Timezone on RHEL 10 on RHEL 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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Common Problems 124134

Oracle Linux 10 – kubelet fails to start due to cgroup v2 misconfiguration

🔴 Critical   ⏱ 5–30 min  Last verified: 9 January 2026 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 Register RHEL 10 with Red Hat Subscription Manager — step-by-step RHEL 10 tutorial on Progressive Robot

How to Register RHEL 10 with Red Hat Subscription Manager

Introduction Setting up register rhel 10 with red hat subscription manager on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Register RHEL 10 with Red Hat Subscription Manager, with all the commands you need, the SELinux and firewalld considerations to keep […]

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How to Install Nagios Core on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Nagios Core on RHEL 10

Introduction How to Install Nagios Core on RHEL 10 on RHEL 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible and […]

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Common Problems 114039

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

🟡 Medium   ⏱ 5–30 min  Last verified: 5 January 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]

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How to Scan Container Images with Trivy on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Scan Container Images with Trivy on RHEL 10

Introduction This tutorial demonstrates how to Scan Container Images with Trivy 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 AppStream […]

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Common Problems 114135

RHEL 10 – dracut rebuild omits multipath modules causing boot device not found

🔴 Critical   ⏱ 5–30 min  Last verified: 2 January 2026 Affected versions: RHEL 10 RHEL 10.0 RHEL 10.1 📖 ~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 & […]

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How to Configure a Patroni PostgreSQL Cluster on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Configure a Patroni PostgreSQL Cluster on Oracle Linux 10

Introduction Setting up configure a patroni postgresql cluster on oracle linux 10 on a Oracle Linux 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure a Patroni PostgreSQL Cluster on Oracle Linux 10, with all the commands you need, the SELinux and firewalld […]

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How to Install dnsmasq on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install dnsmasq on RHEL 10

Introduction This tutorial demonstrates how to Install dnsmasq 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 AppStream repositories enabled. Prerequisites […]

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