Tutorials

Docker Linux Nginx Security Networking Self-hosting Web Server Reverse Proxy VPS Debian Ubuntu Firewall Virtual Hosts BGP RPKI BIRD2 FRRouting VyOS Anycast SSH Fail2Ban n8n Docker Compose PostgreSQL Workflow Automation SSL TLS Let's Encrypt Certbot HTTPS tmux Terminal VPS Administration Claude Code AI Tools RIPE NCC UFW iptables GNU Screen Terminal Multiplexer Screen Session Webhooks Self-Hosted proxy_pass WebSocket Ollama AI Agents MCP sshd_config Ed25519 Rootless Docker Seccomp AppArmor Containers OpenClaw Hermes Agent Routing IPv6 systemd FRR TypeScript Node.js ROA Routinator AI Agent Telegram Vim Text Editor Server Administration AIOps Observability Monitoring SigNoz Grafana Langfuse Prometheus IP Transit Production Logging Disk Management OpenObserve OpenTelemetry Datadog Alternative GDPR nftables Loki Promtail LogQL Claude AI Workflows LangChain Backup MySQL S3 Rclone Cron Python Log Analysis Discord Slack Disaster Recovery Traefik Caddy WireGuard Tailscale VPN Headscale Alertmanager Self-Healing Performance Zero Downtime GitHub Actions AI Code Review Gemini CI/CD Rate Limiting DDoS Protection BIND9 DNS High Availability Privacy Vaultwarden Password Manager BGPalerter Plakar Encryption Deduplication Immich Photo Management Google Photos Alternative Replication Offsite Backup Paperless-ngx Document Management OCR Gitea Git Plausible Analytics ClickHouse Uptime Kuma Beszel Hardening Failover Multihoming BFD LLM Observability DeepEval Windows Server Veeam Migration Bare Metal Restore VirtIO P2V

Tutorial

Ubuntu Debian UFW

Install and Configure Fail2Ban on a Linux VPS

Set up Fail2Ban to block brute-force attacks on SSH and Nginx. Covers UFW and nftables ban actions, custom jails, recidive escalation, and filter testing on Ubuntu 24.04 and Debian 12.

12 min readRead →

Tutorial

Server Administration SSH Text Editor

How to Use Vim on a Linux VPS

A practical Vim tutorial built around real server administration tasks. Learn modes, navigation, editing, search and replace, splits, .vimrc configuration, and workflows for editing Nginx, SSH, and Docker Compose files over SSH.

15 min readRead →

Tutorial

Claude Code VPS AI Tools

Run Claude Code on a VPS: Install, Secure, and Persist Sessions

Set up Claude Code on a remote Linux server with headless authentication, tmux session persistence, and proper security hardening. Complete setup guide.

10 min readRead →

Tutorial

GNU Screen Terminal Multiplexer Linux

How to Use GNU Screen on a Linux VPS

Learn GNU Screen from installation to daily use. Manage sessions, split regions, configure .screenrc, and keep processes running after SSH disconnects on Debian 12 and Ubuntu 24.04.

13 min readRead →

Tutorial

SSH Security Linux

SSH Hardening on a Linux VPS: Complete sshd_config Security Guide

Lock down SSH on your Debian 12 or Ubuntu 24.04 VPS. Ed25519 key generation, sshd_config hardening, ProxyJump bastion setup, cipher hardening, and ssh-audit verification. Tested on Debian 12 and Ubuntu 24.04.

11 min readRead →

Tutorial

tmux Terminal Linux

How to Use tmux on a Linux VPS

Learn how to install and use tmux on your Linux VPS for persistent terminal sessions, split-pane workflows, and surviving SSH disconnects. Covers Debian 12 and Ubuntu 24.04.

12 min readRead →