Swap space acts as overflow memory. When the physical RAM is full, the Linux kernel moves the least-recently-used memory pages to swap on disk, freeing physical RAM for active processes. Without swap, when RAM is exhausted the Out of Memory (OOM) killer terminates processes — often the largest one, which is frequently your database or […]
Introduction How to Configure Automatic Security Updates on CentOS Stream 10 on CentOS Stream 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 […]
🟡 Medium ⏱ 10–30 min Last verified: 15 January 2025 Affected versions: Oracle Linux 9 📖 ~4 min read • Source: ELSA advisory ELSA-2024-2438 Related CVEs: CVE-2024-22365 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
Introduction CentOS Stream 10 ships with a stable, security-hardened base that makes deploying configure fail2ban on centos stream 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Fail2ban on CentOS Stream 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]
🔴 Critical ⏱ 5–30 min Last verified: 14 January 2025 Affected versions: Debian 12 📖 ~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 & […]
🟡 Medium ⏱ 5–30 min Last verified: 14 January 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 […]
Introduction CentOS Stream 10 ships with a stable, security-hardened base that makes deploying install openshift cli on centos stream 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Install OpenShift CLI on CentOS Stream 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]
🟡 Medium ⏱ 5–30 min Last verified: 14 January 2025 Affected versions: Windows Server 2025 📖 ~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 […]
mdadm is the standard Linux tool for creating and managing software RAID arrays. RAID provides redundancy and/or performance improvements across multiple disks. This guide creates a RAID 1 (mirror) array on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Two or more additional block devices (e.g. /dev/sdb, /dev/sdc) […]
Introduction How to Configure Mandatory Integrity Control on CentOS Stream 10 on CentOS Stream 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 […]
