Introduction This tutorial demonstrates how to Harden GRUB Bootloader 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. […]
🟠 High ⏱ 5–30 min Last verified: 4 May 2026 Affected versions: Ubuntu 26.04 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 […]
LVM (Logical Volume Manager) abstracts physical storage into flexible logical volumes that can be resized, snapshotted, and migrated without downtime. It is ideal for servers where storage requirements change over time. This guide configures LVM on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS One or more physical disks […]
🟠 High ⏱ 5–30 min Last verified: 3 May 2026 Affected versions: Ubuntu 26.04 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 How to Configure OpenVPN Server on FreeBSD 15 is a core administration task for any FreeBSD 15 server operator. FreeBSD 15 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, […]
🟡 Medium ⏱ 5–30 min Last verified: 3 May 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 […]
Introduction Oracle Linux 10 ships with a stable, security-hardened base that makes deploying deploy a .net application on oracle linux 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Deploy a .NET Application on Oracle Linux 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]
Introduction Deploying configure ifconfig networking on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + ports approach […]
Introduction Deploying configure zfs send/receive replication on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + ports […]
MySQL primary-replica replication asynchronously copies data from a primary server to one or more replica servers. This improves read scalability, provides a hot standby for disaster recovery, and enables backups from the replica without impacting the primary. This guide sets up replication on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Two […]
