Capacity Planning

Common Problems 117001

Ubuntu 22.04 LTS – /boot full prevents kernel updates – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 November 2023 Affected versions: Ubuntu 22.04 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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Common Problems 124597

Oracle Linux 9 – Common Problem 014 – Diagnosis and Fix

🟡 Medium   ⏱ 5–30 min  Last verified: 8 November 2023 Affected versions: Oracle Linux 9 📖 ~2 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 118032

Out of Disk Space in /var Causes Update Failures

🟡 Medium   ⏱ 5–30 min  Last verified: 4 November 2023 📖 ~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 Ceph Cluster on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Ceph Cluster on Oracle Linux 9

Introduction Oracle Linux 9 ships with a stable, security-hardened base that makes deploying configure ceph cluster on oracle linux 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Ceph Cluster on Oracle Linux 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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How to Set Up Rancher on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Set Up Rancher on Oracle Linux 9

Introduction How to Set Up Rancher on Oracle Linux 9 on Oracle Linux 9 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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How to Install HashiCorp Vault for Secrets Management on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install HashiCorp Vault for Secrets Management on RHEL 9

HashiCorp Vault is an open-source secrets management platform that provides secure storage, access control, and auditing for sensitive data such as API keys, passwords, certificates, and encryption keys. Instead of hardcoding secrets in application configs or environment variables, applications request them from Vault at runtime using short-lived tokens or AppRole credentials. This tutorial covers installing […]

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How to Set Up FluxCD on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up FluxCD on CentOS Stream 9

Introduction Setting up set up fluxcd on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up FluxCD on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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How to Configure OPcache for PHP on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure OPcache for PHP on Oracle Linux 9

Introduction Setting up configure opcache for php on oracle linux 9 on a Oracle Linux 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure OPcache for PHP on Oracle Linux 9, with all the commands you need, the SELinux and firewalld considerations to […]

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How to Configure iSCSI Storage on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure iSCSI Storage on Oracle Linux 9

Introduction Oracle Linux 9 ships with a stable, security-hardened base that makes deploying configure iscsi storage on oracle linux 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure iSCSI Storage on Oracle Linux 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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Common Problems 117115

Ubuntu 22.04 LTS – Disk fills from runaway journald logs – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 24 October 2023 Affected versions: Ubuntu 22.04 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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