linux server Archives

PostgreSQL Database Security in Production: SSL Encryption, pg_hba.conf, and pgAudit

October 7, 2026

Learn how to secure a production PostgreSQL database from the ground up. This guide covers enforcing TLS 1.3 encryption, locking down client authentication with pg_hba.conf, and auditing critical queries with pgAudit.

Networking

SRv6 on Linux: Modernizing Your ISP Backbone with FRRouting

September 7, 2026

Ditch the complexity of MPLS. Learn how to deploy Segment Routing over IPv6 (SRv6) using Linux and FRRouting to build a programmable, scalable ISP backbone.

Networking

Scaling Traffic with Linux Virtual Server (LVS): High-Performance Layer 4 Load Balancing

July 19, 2026

Ditch user-space bottlenecks. Master LVS/IPVS to build high-performance Layer 4 load balancers using NAT and Direct Routing for massive scalability.

Networking

Building an Automated DDoS Detection and Response System with FastNetMon

July 5, 2026

FastNetMon is a traffic analysis daemon that detects volumetric DDoS attacks in seconds and automatically triggers iptables blocks or BGP blackholing. This guide walks through setting it up on a Linux server with automated response scripts — no cloud scrubbing service required.

Linux

Linux CPU Frequency Scaling with cpupower and cpufreq-utils: Boost Performance and Save Power

June 16, 2026

CPU frequency scaling governors directly affect how fast your Linux system responds under load. This guide walks through using cpupower and cpufreq-utils to inspect, change, and persist governor settings on both servers and laptops, with real command examples and tips from production deployments.

Networking

SR-IOV on Linux: Slashing Latency and Reclaiming CPU for Virtual Workloads

May 23, 2026

Tired of network latency in your VMs? Learn how to configure SR-IOV on Linux to bypass the kernel, reduce CPU overhead, and achieve near-native networking speeds.

Security

Ditch the SSH Key Mess: Centralized Access with Smallstep Certificates

May 17, 2026

Say goodbye to the 'authorized_keys' mess. This guide shows you how to implement SSH Certificates with Smallstep for a centralized, SSO-integrated, and highly secure infrastructure.

Networking

Mastering Smokeping: How to Kill the ‘2 AM Network Ghost’ on Linux

May 6, 2026

Learn how to deploy and configure Smokeping on Linux. Track network latency, jitter, and packet loss over time with historical RRDtool graphs to solve intermittent connectivity issues.

Networking

Mastering Port Mirroring: Using Open vSwitch (OVS) for Passive Linux Monitoring

May 5, 2026

Don't risk production downtime for network visibility. Learn how to configure Open vSwitch Port Mirroring (SPAN) to capture and analyze traffic safely on Linux.

Networking

Netplan on Ubuntu: A Pro’s Guide to YAML Networking

April 21, 2026

Ditch the old /etc/network/interfaces. Learn how to use Netplan on Ubuntu to configure static IPs, DHCP, and DNS using clean YAML syntax while avoiding common pitfalls.