Here is a robust way to prevent screen blanking on a Debian 12 kiosk during specific hours (10:00 to 13:00, Monday to Friday) while avoiding persistent configuration changes that could be missed during power cycles. The system also must stay…
The Silent Killer of Network Connectivity: MTU Mismatches and PMTUD Black Holes Ever found yourself in a networking nightmare where pings work perfectly, but then SSH sessions hang mysteriously, or large file transfers just die? You’ve checked your firewalls, verified…
Reverse Path Filtering (RPF): Linux and many other OSes/routers implements a security feature called Reverse Path Filtering (RPF), often controlled by rp_filter sysctl parameter (e.g., /proc/sys/net/ipv4/conf/all/rp_filter). Purpose: RPF prevents IP spoofing and helps mitigate certain types of attacks. It works…
If you’ve configured a Debian 12 system in virt-manager and want to install it on real hardware, this guide shows how to transfer the VM image to a USB stick and boot it on a physical machine. 🔧 Step 1:…
🎬 1. Plan Your Video 📹 2. Record Yourself Holding the Phone (Intro Clip) 📱 3. Record the Phone Screen On Android: On iPhone: 👇 4. Add a Virtual Finger or Pointer 🖼️ 5. Picture-in-Picture (Your Face in the Corner)…