Introduction How to Harden the FreeBSD Kernel with sysctl on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 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 […]
Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying install icinga2 on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Install Icinga2 on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]
Patroni is a Python-based high-availability solution for PostgreSQL that uses a distributed configuration store — in this tutorial, etcd — to manage leader election, automatic failover, and cluster membership. On RHEL 8, both Patroni and etcd are available through the EPEL repository, making the installation straightforward. This guide walks through installing PostgreSQL, etcd, and Patroni, […]
🟡 Medium ⏱ 5–30 min Last verified: 6 October 2020 📖 ~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 […]
🟠 High ⏱ 5–30 min Last verified: 6 October 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]
🟡 Medium ⏱ 5–30 min Last verified: 4 October 2020 📖 ~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 […]
Introduction Deploying set up mariadb galera cluster on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before […]
🟠 High ⏱ 5–30 min Last verified: 3 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: Oracle Bug OLRNB-ol8-issues-kernel 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 […]
Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up podman on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up Podman on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]
How to Configure Windows Server 2016 RDMA Networking Remote Direct Memory Access (RDMA) is a high-performance networking technology that enables direct memory-to-memory data transfers between networked computers without involving the host CPU or operating system. RDMA dramatically reduces latency, increases throughput, and lowers CPU utilization compared to traditional TCP/IP networking. Windows Server 2016 provides comprehensive […]
