How to Set Up an NFS Mount on Ubuntu (Step-by-Step Guide)
Set up NFS mounts on Ubuntu servers for network file sharing. Learn server and client configuration, firewall setup, and persistent mounts for Ubuntu servers.
How to Configure StrongSwan IPsec on FreeBSD 12
Introduction How to Configure StrongSwan IPsec 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 for packet filtering, […]
How to Set Up Chef Infra Client on Debian 10
Introduction How to Set Up Chef Infra Client on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian […]
Windows Server 2012 R2 Backup CBT Driver Increases Kernel I/O Latency – Fix & Prevention
🟠 High ⏱ 5–30 min Last verified: 18 June 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 […]
How to Secure Apache with Let’s Encrypt on FreeBSD 12
Introduction Deploying secure apache with let’s encrypt on freebsd 12 on a FreeBSD 12 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 […]
How to Configure iSCSI Target and Initiator on Debian 10
Introduction This guide explains how to Configure iSCSI Target and Initiator on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with […]
Ubuntu 18.04 LTS – cloud-init overrides static networking unexpectedly – Fix & Prevention
🟠 High ⏱ 5–30 min Last verified: 17 June 2020 Affected versions: Ubuntu 18.04 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 Configure dnsmasq on Debian 10
Introduction This guide explains how to Configure dnsmasq on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the standard repositories […]
Ubuntu 18.04 Wi-Fi disconnects or fails to reconnect
🟡 Medium ⏱ 5–30 min Last verified: 16 June 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 […]
Ubuntu 16.04 LTS – high CPU caused by kworker threads
🟠 High ⏱ 5–30 min Last verified: 15 June 2020 Affected versions: Ubuntu 16.04 LTS Ubuntu 16.04 Ubuntu 16.04.7 📖 ~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 […]
