Infrastructure tutorials

Production-grade guides for Linux, servers, security and performance. Copy-paste commands, multi-distro support, written by engineers who run this in production.

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Configure Linux system time synchronization with chrony and NTP hardening

linux
878

Set up Node.js application security with Helmet and rate limiting

security
755

Install and configure Caddy web server with automatic HTTPS and reverse proxy

hosting
740

Install and configure Uvicorn ASGI server with systemd and reverse proxy for FastAPI applications

hosting
734

Install and configure PostgreSQL 17 with performance tuning and security hardening

databases
721

Recently published

Configure systemd service resource limits and security isolation

linux
4 hours ago

Configure NGINX SSL termination with Redis session storage

hosting
4 hours ago

Configure intrusion detection with OSSEC and fail2ban integration

security
4 hours ago

Set up Varnish 7 cluster with load balancing across multiple backends

performance
4 hours ago

Configure OSSEC active response for automated threat blocking

security
9 hours ago
"qos" × Clear all
networking Advanced

Set up Linux network traffic shaping with tc and QoS for bandwidth management

Learn how to implement advanced network traffic control on Linux using tc (traffic control) and HTB (Hierarchical Token Bucket) queueing disciplines. This tutorial covers bandwidth limiting, QoS policies, and traffic prioritization for optimal network performance.

45 min 4 distros 10 views
security Intermediate

Implement Linux security hardening with CIS benchmarks and automated compliance scanning

Harden your Linux systems using CIS benchmarks with automated compliance scanning and continuous monitoring. Learn to implement security controls for filesystem permissions, user authentication, network policies, and maintain ongoing compliance with industry standards.

45 min 4 distros 13 views
security Intermediate

Configure SSL certificates and security hardening for Nexus Repository Manager

Secure your Nexus Repository Manager with SSL/TLS certificates, enforce HTTPS connections, and implement comprehensive security hardening including authentication controls, access policies, and audit logging for production environments.

45 min 4 distros 108 views
devops Intermediate

Implement Kafka Streams processing applications with Java and Scala for real-time data analytics

Build production-ready Kafka Streams applications using Java and Scala for real-time data processing, including stateless transformations, stateful aggregations, windowing, and stream joins with exactly-once semantics.

45 min 4 distros 49 views
networking Advanced

Set up iptables high availability clustering with keepalived for automatic failover

Configure a highly available firewall cluster using iptables and keepalived with VRRP for automatic failover. Set up rule synchronization between nodes and implement monitoring for production-grade firewall redundancy.

45 min 4 distros 158 views
networking Advanced

Set up Open vSwitch 3.3 for advanced virtual machine networking with VLAN and bridge configuration

Configure Open vSwitch 3.3 to create isolated virtual networks for VMs with VLAN tagging, bridge management, and advanced traffic control. Essential for virtualization environments requiring network segmentation and high-performance VM networking.

45 min 4 distros 173 views
networking Advanced

Set up nftables IPv6 NAT and dual-stack networking with firewall rules and traffic forwarding

Configure nftables with IPv6 NAT masquerading, dual-stack IPv4/IPv6 forwarding, and comprehensive firewall rules for secure network routing and traffic management on modern Linux systems.

45 min 4 distros 446 views
networking Advanced

Configure advanced iptables QoS with DSCP marking and traffic classification

Set up Quality of Service (QoS) on Linux servers using iptables DSCP marking, HTB queuing, and traffic classification. This tutorial shows you how to prioritize network traffic, implement bandwidth limits, and ensure critical applications get the network resources they need for optimal performance.

35 min 4 distros 294 views
networking Intermediate

Configure nftables NAT and port forwarding for home lab environments

Learn how to configure nftables for NAT and port forwarding in home lab environments. This tutorial covers basic NAT masquerading, port forwarding rules, and advanced networking scenarios for virtual machines and containers.

25 min 4 distros 561 views
networking Beginner

Set up network interface monitoring with SNMP and basic traffic analysis

Learn how to install and configure SNMP daemon for network interface monitoring, implement basic traffic analysis with automated alerting, and create monitoring scripts with cron jobs for continuous network performance tracking.

25 min 6 distros 558 views
networking Advanced

Configure OSPF dynamic routing with FRRouting for enterprise network failover

Set up Open Shortest Path First (OSPF) protocol using FRRouting for dynamic network routing, multi-area configurations, and automatic failover in enterprise environments.

45 min 6 distros 426 views
networking Intermediate

Configure network traffic shaping with tc and HTB for bandwidth management and QoS

Set up hierarchical token bucket (HTB) traffic shaping with tc to control bandwidth allocation, prioritize network traffic, and implement quality of service policies for optimal network performance.

45 min 6 distros 516 views

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