Tutorials
Step-by-step technical guides on Docker, Linux, Python, Go, and more.
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SSH Config File (~/.ssh/config) Complete Guide (2026)
Complete guide to the ~/.ssh/config file. Host blocks, IdentityFile, ProxyJump, ServerAliveInterval, multiple GitHub/GitLab accounts, Include directive explained.
SSH Key Generation and Management in 2026: ed25519, RSA, and More
SSH key generation in 2026: ed25519 vs RSA-4096 vs ECDSA comparison, ssh-keygen commands, ssh-copy-id, authorized_keys, ssh-agent, key rotation guide.
Create and Manage systemd Service Files: Complete Guide (2026)
Create systemd service files in 2026. [Unit], [Service], [Install] sections explained. ExecStart, Restart, User, EnvironmentFile. Real Python Flask app example.
systemd Timers vs Cron: When to Use Each (2026)
systemd timers vs cron comparison 2026. OnCalendar syntax, catch-up runs, logging, per-user timers, migration example from cron to systemd timer. FAQ included.
Teaching AI Literacy to Students — A Practical Classroom Framework for 2026
A practical framework for teaching AI literacy across K-12 and university — age-appropriate activities, free resources, and assessment approaches for 2026.
esxcli hardware pci pcipassthru list — ESXi PCI Passthrough CLI Guide
Enable VMware ESXi PCI passthrough using esxcli hardware pci pcipassthru list and esxcli hardware pci pcipassthru enable. No GUI required. Includes verification and reboot steps.
SSH Tunneling on AIX: Port Forwarding Guide [With Examples]
Learn SSH tunneling and port forwarding on AIX. Local forwarding, remote forwarding, dynamic SOCKS proxy, and practical examples for secure access.
How to Blacklist Nouveau NVIDIA Driver in 2026 (Ubuntu, Arch, Fedora, Rocky Linux)
Updated 2026: Blacklist the Nouveau NVIDIA driver on Ubuntu, Arch, Fedora, Rocky Linux, and openSUSE. Includes distro-specific initramfs commands, GRUB fallback method, Secure Boot warning, and steps to verify with lsmod and install NVIDIA drivers.
Flask API POST Request: Complete Guide to Handling POST Data
Learn how to handle POST requests in Flask. This tutorial covers receiving JSON, form data, file uploads, validation, building REST APIs, and advanced Domain-Driven Design (DDD) architecture patterns.
SCP and SFTP on AIX: Secure File Transfer Guide [Examples]
Complete guide to SCP and SFTP file transfer on AIX. Learn secure copy commands, SFTP usage, batch transfers, and troubleshooting tips.