Expert tutorials, guides, and tips on Linux, DevOps, and IT Administration
Level up your SSH skills with 15 practical tips: multiplexing, tunnels, jump hosts, agent forwarding, config file tricks, and security hardening....
Learn how to create a bulletproof Linux disaster recovery plan. From backup verification to automated failover — protect your servers from catastrophic data loss....
Set up automated, encrypted Linux backups with rsync and Borg Backup. Complete guide with cron schedules, retention policies, and monitoring scripts....
Master Azure automation with PowerShell in 2026. Covers Az module installation, authentication (Service Principals, Managed Identity), VM management, networking, storage, Azure SQL, AKS, Key Vault, RBAC, Azure Policy, Cost Management, Azure Functions with PowerShell, CI/CD pipelines, monitoring and alerting, disaster recovery scripts, and production-ready automation patterns with 50+ real-world code examples....
The definitive Microsoft Azure guide for IT professionals and system administrators in 2026. Covers core services, Azure AD (Entra ID), virtual machines, networking, Kubernetes (AKS), serverless, storage, security, cost optimization, hybrid cloud with Azure Arc, PowerShell automation, certifications (AZ-900 through AZ-500), and real-world deployment scenarios with CLI examples....
The definitive comparison of the three major cloud platforms in 2026. Covers compute, storage, networking, databases, Kubernetes, serverless, pricing, free tiers, certifications, market share, and which platform to choose based on your career goals and workload requirements — with detailed tables and real-world cost analysis....
Everything you need to know about Wazuh — the leading free, open-source SIEM and XDR platform. Covers architecture, agent deployment, intrusion detection, log analysis, file integrity monitoring, vulnerability detection, compliance (PCI DSS, HIPAA, GDPR), Wazuh vs Splunk vs ELK comparison, Docker deployment, custom rules, and real-world SOC integration....
The definitive guide to hardening your Linux servers in 2026. Covers SSH hardening, firewall configuration with firewalld and nftables, SELinux enforcement, kernel security (sysctl), automatic patching, rootkit detection, audit logging, fail2ban, CIS benchmarks, file integrity monitoring, and a full post-install hardening checklist — with commands you can run today....
Everything you need to know about Grok — the AI model built by Elon Musk's xAI. Covers Grok 3 and Grok 3.5 capabilities, real-time X (Twitter) integration, API access and pricing, how it compares to ChatGPT, Claude and Gemini, coding ability, reasoning benchmarks, DeepSearch, and practical use cases for developers and IT professionals....
The definitive guide to passing the Red Hat Certified System Administrator (RHCSA) EX200 exam in 2026. Covers every exam objective in detail: essential system administration, user management, storage with LVM and Stratis, networking, firewalld, SELinux, containers with Podman, shell scripting, boot troubleshooting, and time management strategies for the performance-based exam....
Everything you need to know about becoming a SOC Analyst in 2026. Covers daily responsibilities, essential tools (SIEM, EDR, SOAR), required skills, certification roadmap (CompTIA Security+, CySA+, GCIA), salary data across EU and US, career progression from Tier 1 to SOC Manager, and how to get your first cybersecurity job....
The definitive guide to Ubuntu 24.04 LTS (Noble Numbat) server administration. Covers installation, initial hardening, AppArmor, UFW firewall, Nginx, PHP, databases, Docker, Snap packages, automatic updates, performance tuning, and everything you need to run Ubuntu in production....