🟡 Medium ⏱ 5–30 min Last verified: 1 November 2021 Affected versions: Ubuntu 20.04 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 […]
How to Build Grafana Dashboards for Linux Server Metrics on RHEL 7 Grafana is the de facto standard for visualising time-series data collected by Prometheus, InfluxDB, Graphite, and dozens of other data sources. A well-constructed Grafana dashboard can surface CPU saturation, memory pressure, disk I/O bottlenecks, and network anomalies at a glance, dramatically reducing the […]
How to Export and Import Hyper-V Virtual Machines on Windows Server 2012 R2 Exporting and importing virtual machines is a fundamental Hyper-V administrative skill used for VM backup, migration between hosts, cloning, and archiving. Windows Server 2012 R2 significantly improved the export and import workflow compared to previous versions — exports now occur without needing […]
Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up configure samba on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. This […]
Introduction This guide explains how to Install PHP 8.2 on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained privilege […]
How to Harden SSH on RHEL 7 SSH (Secure Shell) is the primary remote administration protocol for RHEL 7 servers, and by default its configuration leaves several attack vectors open. Brute-force attacks against exposed SSH ports are constant on any internet-facing host, making SSH hardening one of the first tasks every RHEL 7 administrator should […]
🟠 High ⏱ 5–30 min Last verified: 29 October 2021 Affected versions: 20.04 📖 ~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 […]
Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up amanda backup on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux […]
Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install cadvisor for container monitoring on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any […]
How to Set Up Active Directory Domain Services on Windows Server 2019 Active Directory Domain Services (AD DS) is the cornerstone of Windows enterprise identity management. It provides centralized authentication and authorization using Kerberos and LDAP, enables Group Policy for configuration management, and creates a hierarchical structure of domains, trees, and forests. This guide walks […]
