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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Install and configure Deno for web development with systemd and reverse proxy

hosting
10,623

Install and configure Uptime Kuma for website monitoring with SSL and email alerts

monitoring
6,476

Fix apt update E: Repository no longer has a Release file

linux
5,970

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

hosting
5,562

Install and configure TimescaleDB with PostgreSQL for high-performance time-series data

databases
5,082

Recently published

Set up automated MariaDB Galera cluster backups with compression

databases
1 week ago

Configure MariaDB ColumnStore for high-performance analytics workloads

databases
1 week ago

Implement Kibana 8 custom threat hunting dashboards for security incident response

monitoring
2 weeks ago

Configure Logstash 8 security pipelines with threat intelligence enrichment

monitoring
3 weeks ago

Configure Ansible Vault integration with HashiCorp Vault for secrets management

devops
3 weeks ago
"port forwarding" × Clear all
monitoring Advanced

Configure Kubernetes network monitoring with Hubble and Cilium for traffic visibility

Enable Hubble on Cilium to get real-time eBPF-based flow visibility, deploy Hubble UI and Relay, and integrate flow metrics with Prometheus and Grafana for full Kubernetes network observability.

75 min 4 distros 423 views
devops Advanced

Implement Istio observability with Jaeger tracing and Kiali dashboard for Kubernetes service mesh

Configure comprehensive observability for your Kubernetes service mesh with Jaeger distributed tracing, Kiali visualization, and Prometheus metrics integration. Get complete visibility into microservice communication patterns, performance bottlenecks, and service dependencies.

45 min 4 distros 906 views
devops Advanced

Implement Kubernetes workload rightsizing with VPA recommendations and cost analysis

Set up Vertical Pod Autoscaler to automatically optimize resource requests and limits for your Kubernetes workloads. Create cost analysis dashboards to track resource utilization and identify opportunities for rightsizing containers in production clusters.

45 min 4 distros 884 views
devops Advanced

Integrate OPA Gatekeeper with ArgoCD for GitOps policy management

Set up Open Policy Agent Gatekeeper with ArgoCD to enforce Kubernetes admission policies through GitOps workflows. This tutorial covers installation, policy template creation, and automated policy enforcement with monitoring.

45 min 4 distros 1,016 views
monitoring Intermediate

Monitor Kubernetes cluster with Prometheus Operator for comprehensive observability

Set up complete cluster monitoring using Prometheus Operator with automated metrics collection, custom dashboards, and intelligent alerting for production Kubernetes environments.

45 min 4 distros 906 views
security Intermediate

Implement two-factor authentication for SSH with Google Authenticator and TOTP

Secure your SSH connections by adding TOTP-based two-factor authentication using Google Authenticator and PAM modules for an additional layer of protection beyond passwords and keys.

25 min 4 distros 1,149 views
security Intermediate

Set up SSH bastion host with jump server configuration for secure network access

Configure an SSH bastion host to secure access to private networks, implementing jump server functionality with key-based authentication and access controls for enhanced security.

25 min 4 distros 1,114 views
linux Beginner

Fix SSH sign_and_send_pubkey: signing failed: agent refused operation

Resolve SSH authentication errors when the SSH agent refuses to sign public keys. This tutorial covers checking agent status, fixing key permissions, restarting the agent, and troubleshooting SSH client configuration.

20 min 6 distros 3,260 views
security Intermediate

Configure SSH port forwarding and tunneling for secure connections

Learn to configure SSH port forwarding, remote tunnels, and SOCKS proxy for secure network connections. Set up local, remote, and dynamic port forwarding with automated monitoring and security hardening.

35 min 4 distros 1,151 views
monitoring Intermediate

Monitor Kubernetes clusters with Prometheus and Grafana for container orchestration insights

Set up comprehensive Kubernetes monitoring using the Prometheus Operator and Grafana with persistent storage, RBAC, ServiceMonitors, and custom dashboards for complete cluster observability.

45 min 4 distros 1,277 views
security Intermediate

Implement network security with iptables connection tracking and stateful packet filtering

Configure iptables with connection tracking modules to implement stateful packet filtering, advanced NAT rules, and comprehensive network security monitoring. Build robust firewall rules that track connection states and provide granular control over network traffic.

45 min 4 distros 1,760 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 2,604 views

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