sysadmin Archives - Page 4 of 12

Networking tutorial - IT technology blog

Stop Using ifconfig: A Guide to Professional Networking with nmcli

May 21, 2026

Ditch deprecated tools like ifconfig. Learn how to use nmcli for professional Linux networking, including static IP setup, DNS management, and SSH safety tips.

Networking

Bypassing Strict Firewalls with Chisel: A 6-Month Production Review

May 19, 2026

Is your firewall blocking everything but port 443? Here is a 6-month field report on using Chisel to tunnel TCP/UDP traffic over WebSockets with zero downtime.

Security

Defending Active Directory: Real-World Tactics Against PtH, Kerberoasting, and Golden Ticket Attacks

May 19, 2026

Secure your Active Directory against modern credential theft. A hands-on guide to using BloodHound for auditing, GPO hardening for PtH, and Sysmon for Kerberoasting detection.

Networking

6 Months with Checkmk on Linux: From Infrastructure Chaos to a Single Pane of Glass

May 18, 2026

Based on 6 months of production use, this guide shows you how to replace fragmented monitoring tools with a unified Checkmk setup on Ubuntu for servers and network gear.

HomeLab

Taming the Power Bill: Optimizing Your HomeLab with Powertop and TLP

May 15, 2026

Slash your HomeLab's electricity bill. This guide covers real-world power optimization using Powertop auto-tuning, TLP configuration, and smart scheduling to reduce idle draw.

Linux

SSH ProxyJump and Bastion Hosts: A Practical Guide to Secure Linux Access

May 15, 2026

Master SSH ProxyJump to securely manage private Linux servers. This guide provides a setup walkthrough, configuration tips, and security best practices for Bastion Hosts.

Linux

Linux find and xargs: Pro-Level Batch File Processing

May 14, 2026

Master Linux find and xargs to process thousands of files without breaking your server. Learn performance-optimized techniques for searching, permissions, and parallel processing.

Linux

Stop the Linux Audio Headache: A 6-Month PipeWire Switch Report

May 14, 2026

My 6-month experience switching to PipeWire. Learn how to fix Linux audio fragmentation, achieve 5.3ms latency, and enable high-quality Bluetooth codecs like LDAC.

Networking

Linux VRF: How to Run Multiple Independent Routing Tables on a Single Server

May 14, 2026

Tired of routing conflicts? Learn how to use Linux VRF to create multiple independent routing tables. This guide covers setup, interface assignment, and running services in isolated network contexts.

Linux

Linux I/O Scheduling: Solving Disk Bottlenecks in Databases and File Servers

May 14, 2026

Is your server lagging during backups? Learn how to master Linux I/O scheduling and use ionice to prioritize database traffic over background tasks.