SSH Bastion: Securing Access to Your Servers
Learn why and how to use an SSH bastion to secure access to your production or cloud servers.
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Linux & Cybersecurity Tutorials
Over 66 free practical guides to secure and administer your Linux servers.
66
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9
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Popular tutorials
The most viewed guides in the community
Popular
Virtualisation
Installing and Configuring Docker on Linux
Complete guide to install Docker, create containers and manage your applications with modern containerization.
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2 min
Popular
Sécurité
Fail2Ban: Protecting Your Server from Brute-Force Attacks
A detailed tutorial to install and configure Fail2Ban, a protection solution against brute-force attacks on Linux.
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4 min
Popular
Serveur Web
Installing and Configuring NGINX on Linux
Learn how to install and configure NGINX, the high-performance web server used by the largest websites in the world.
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6 min
66 tutorials available
List of tutorials
ClamAV: Open-Source Antivirus for Linux
Detailed tutorial to install and configure ClamAV, an open-source antivirus, to protect your system against malware.
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OpenVPN Server: Set up your own VPN server
Complete tutorial to install and configure an OpenVPN server, in order to create a secure virtual private network.
Read the tutorial 4 min
Reverse Proxy: Apache, Nginx, or Traefik
A detailed tutorial on configuring a reverse proxy with Apache, Nginx, or Traefik on Linux to optimize and secure your infrastructure.
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WireGuard: A Simple, High-Performance VPN
Tutorial to install and configure WireGuard, a modern, simple and high-performance VPN solution to secure your network connections.
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Snort: Network Intrusion Detection (NIDS)
A detailed tutorial to install and configure Snort, a network intrusion detection system (NIDS), to monitor and secure your infrastructure.
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RKHunter: Rootkit Detection on Linux
A tutorial to install and configure RKHunter (Rootkit Hunter), a tool for detecting rootkits and backdoors on Linux.
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WordPress: Build a Website with the CMS
Tutorial to install and configure WordPress, the most popular content management system (CMS), on a Linux server (LAMP/LEMP).
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Proxmox VE: Virtualization and Containers
Complete guide to installing and configuring Proxmox VE, an open-source virtualization solution for managing virtual machines (KVM) and containers (LXC).
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WAPT: Windows Application Deployment
Detailed tutorial to install and configure WAPT, an open-source application deployment and management solution for Windows environments.
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Postfix: Setting Up a Mail Server
Detailed tutorial to install and configure Postfix, an open-source Mail Transfer Agent (MTA), on Linux.
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Automatic updates with unattended-upgrades
Tutorial to configure unattended-upgrades and apt-listchanges on Debian/Ubuntu to automate security updates and receive notifications.
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Lynis: Security Auditing for Linux
Detailed tutorial to install and configure Lynis, an open-source security auditing tool, to harden the security of your Linux system.
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Portsentry: Port Scan Detection
Tutorial to install and configure Portsentry, a tool that detects port scans and blocks attackers\' IP addresses.
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FOG Project: System Image Deployment
A guide to installing and configuring FOG Project, an open-source solution for cloning and deploying system images.
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Auditd: Monitoring and Auditing on Linux
Complete guide to installing and configuring auditd on a Linux system to monitor security events and generate detailed logs.
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Logwatch: Log Monitoring and Analysis
Detailed tutorial to install and configure Logwatch, a system log monitoring and analysis tool, on a Linux distribution.
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Tripwire: File Integrity Monitoring
A tutorial to install and configure Tripwire, an intrusion detection and file integrity monitoring (FIM) tool.
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Apt-Listbugs: Avoid Buggy Updates
Complete guide to install and use apt-listbugs in order to avoid installing packages with critical bugs on a Debian or Ubuntu system.
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Sysstat: System Performance Monitoring
Detailed tutorial to install and configure sysstat to monitor the performance of a Linux system using tools such as sar, mpstat, and iostat.
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VMware ESXi: Installation and Configuration
Complete guide to install and configure VMware ESXi in order to virtualize your servers and optimize your hardware resources.
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AppArmor Utils: Managing Security Profiles
A complete guide to using AppArmor Utils to create, manage and harden the security profiles of your applications on Linux.
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AppArmor: Securing Linux Applications
Complete guide to install and configure AppArmor on a Linux system in order to harden application security with access control profiles.
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JAMF: Apple Device Fleet Management
Guide to configuring JAMF to manage and secure macOS and iOS devices in a professional environment.
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Acct: Process Accounting on Linux
Complete guide to installing and configuring acct (GNU Accounting Tool) to monitor and record process usage on a Linux system.
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NTP Client: Synchronizing Your System Time
Tutorial to install and configure an NTP client on Linux in order to synchronize the system time with reliable time servers.
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DNSSEC: Securing DNS Queries with BIND
A tutorial to install and configure DNSSEC with BIND on Linux to protect your DNS infrastructure against cache poisoning attacks.
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Apache Guacamole: Remote Desktop via the Browser
A tutorial to install and configure Apache Guacamole, a clientless remote desktop gateway, to access your machines through a web browser.
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Needrestart: Managing Service Restarts
Tutorial to install and configure needrestart to check and restart services after updates on a Linux system.
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cron-apt: Automating Updates on Debian/Ubuntu
A guide to installing and configuring cron-apt, a tool for automating package updates on Debian/Ubuntu systems.
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GPOs on Windows Server: Centralized Management
Guide to configuring Group Policy Objects (GPOs) on Windows Server to manage workstation and user configurations.
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msmtp: Send Emails Through an SMTP Relay
Tutorial to install and configure msmtp, a lightweight SMTP client, to send emails from the command line or from scripts through an external SMTP server.
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FTPS: Securing FTP Transfers with SSL/TLS
Detailed tutorial to install and configure FTPS (FTP over SSL/TLS) with vsftpd on Linux for secure file transfers.
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Chroot SFTP: Isolating SFTP Users
Step-by-step guide to setting up a secure SFTP environment with chroot, to restrict users to their dedicated directories.
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Fail2Ban: Protecting Your Server from Brute-Force Attacks
A detailed tutorial to install and configure Fail2Ban, a protection solution against brute-force attacks on Linux.
Read the tutorial 4 min
Installing and Configuring Docker on Linux
Complete guide to install Docker, create containers and manage your applications with modern containerization.
Read the tutorial 2 min
Installing and Configuring NGINX on Linux
Learn how to install and configure NGINX, the high-performance web server used by the largest websites in the world.
Read the tutorial 6 min
iptables: Configuring a Firewall on Linux
Detailed tutorial to configure iptables, the Linux kernel firewall, in order to secure your system.
Read the tutorial 5 min
Wireshark: Analyzing Network Traffic on Linux
Wireshark is the most widely used network protocol analyzer in the world. This tutorial covers installation, packet capture, display filters, analysis of the HTTP, DNS, TLS and TCP protocols, as well as using tshark from the command line to automate your analyses.
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UFW: A Simple Firewall for Linux
Detailed tutorial to install and configure UFW (Uncomplicated Firewall), a simplified front-end for iptables, to secure a Linux server.
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OpenSSH Server: Installation and Hardening
Detailed guide to install, configure and secure an OpenSSH server on Linux.
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Nmap: Scan and Audit a Linux Network
Nmap (Network Mapper) is the reference tool for network mapping and security auditing. This tutorial walks you through installation, scan types, NSE scripts and best practices for using Nmap legally and effectively.
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Suricata: high-performance network IDS/IPS
Tutorial to install and configure Suricata, a modern, multi-threaded network intrusion detection and prevention engine (IDS/IPS).
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Apache2: Installing a Web Server
Detailed tutorial to install and configure the Apache 2 web server on a Linux distribution.
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Build Your Own AI Agents: LangChain, AutoGen and Advanced Patterns
Build autonomous AI agents with LangChain 0.3+ and AutoGen 0.4+: ReAct pattern, RAG, multi-agent, security, FastAPI and Docker deployment. Complete 2025 guide.
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Advanced Ansible: Roles, Collections, AWX and CI/CD Pipelines
Complete advanced Ansible guide: best-practice roles, Galaxy collections, dynamic AWS/GCP inventories, AWX/Automation Controller, multi-distro Molecule and GitHub Actions + GitLab CI pipelines.
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Cloud Security: Securing AWS, GCP and Azure in Production
Advanced cloud security guide 2026: least-privilege IAM, VPC best practices, secrets management (Secrets Manager, Key Vault, Secret Manager), audit and compliance, secure Terraform with checkov/tfsec and a 25+ point multi-cloud checklist.
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Advanced Kubernetes: Operators, Helm Security and GitOps with ArgoCD
Master advanced Kubernetes: Operators and CRDs, Helm security, GitOps with ArgoCD, cluster hardening, Prometheus Operator. Complete DevSecOps guide 2026.
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Prometheus & Grafana: Complete Monitoring for Your Linux Infrastructure
Complete Prometheus & Grafana 2026 guide: Docker Compose, PromQL, AlertManager, dashboards, exporters, Thanos HA. Monitor your entire Linux infrastructure.
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Supply Chain Security: SBOM, SCA and CI/CD Hardening
Learn how to secure your software supply chain end to end: generate SBOMs with Syft, scan dependencies with Trivy and Grype, harden your GitHub Actions and GitLab CI pipelines, sign your artifacts with Cosign and reach the SLSA levels.
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Advanced Docker: Multi-stage Builds, Healthchecks and Security
Advanced Docker guide for production: multi-stage builds for images 10x lighter, reliable healthchecks, image and runtime security, production-ready Docker Compose, and a multi-arch CI/CD pipeline.
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Docker in Production: BuildKit, Compose v2, Multi-stage and Security
Master Docker in a production environment with BuildKit, multi-stage builds, Compose v2, image security and monitoring. A complete and pragmatic guide.
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SSH 2FA: Two-Factor Authentication with Google Authenticator
Set up two-factor authentication on SSH with Google Authenticator to strengthen the security of your Linux servers.
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Let\'s Encrypt: Free SSL Certificates with Certbot
Learn how to secure your websites with free SSL/TLS certificates thanks to Let\'s Encrypt and Certbot. From a simple certificate to wildcards, including automatic renewal.
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Crontab: Scheduling automated tasks on Linux
Learn how to schedule and automate your recurring tasks on Linux with crontab, cron and anacron. From basic syntax to advanced debugging techniques.
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GitLab CI/CD: Continuous Integration Pipeline
Learn how to configure complete CI/CD pipelines with GitLab: runners, stages, jobs, cache, artifacts, Docker and automated deployment.
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HAProxy: Load Balancing and High Availability
Learn how to configure HAProxy to distribute traffic across your servers, ensure high availability and optimize the performance of your applications.
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Kubernetes: Installing and Deploying Clusters
A complete guide to installing Kubernetes with kubeadm, deploying containerized applications and administering your clusters in production.
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LVM: Managing Logical Volumes on Linux
Master LVM to manage your Linux storage with flexibility: live resizing, snapshots, thin provisioning and data migration.
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Prometheus + Grafana: Complete Monitoring Stack
Step-by-step guide to install and configure a monitoring stack with Prometheus, Grafana and Alertmanager on a Linux infrastructure.
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rsync: File Synchronization and Backup Strategies
Master rsync to synchronize your files and set up robust incremental backup strategies with automatic rotation.
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systemd: Complete Linux Service Management
Master systemd from A to Z: service management, unit creation, timers, journald, targets, hardening and debugging on modern Linux systems.
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Terraform: Infrastructure as Code for beginners
Learn how to automate the deployment of your cloud infrastructure with Terraform, the reference IaC tool created by HashiCorp.
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Zabbix: IT Infrastructure Monitoring
Learn how to deploy Zabbix to monitor your infrastructure: server installation, agents, templates, triggers, alerts and dashboards.
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Ansible: Automation and Configuration Management
Learn how to use Ansible, the open source automation tool, to manage your servers and deploy applications simply and efficiently.
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pfSense: Open Source Firewall and Router
A complete guide to installing and configuring pfSense, a powerful open source firewall and routing solution for businesses.
Read the tutorial 11 min
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