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Technical resources about Networking.
A missing Wi-Fi menu, a missing adapter, and one missing network are different failures. Follow this evidence-first Ubuntu workflow to locate the broken layer before restarting services or changing drivers.
An IP address is a starting clue, not a complete device identity. Correlate Linux routing and neighbour data with DNS, DHCP or cloud inventory, then use the smallest authorized Nmap probe that answers the remaining question.
Use `rsync` over SSH as a restartable transfer protocol: keep partial data, rerun the same command after a disconnect, publish only after checksum verification, and avoid exposing a temporary HTTP server.
The error means the resolver could not return a usable address for the requested name and address family. Diagnose the same NSS path the application uses before editing `/etc/hosts`, changing DNS, or flushing caches.
A smart TV may support Miracast screen projection, DLNA media playback, Google Cast, or only some of them. This guide helps you identify the right protocol, connect Windows 11 safely, and diagnose the failures that make a visible TV refuse to play a file.
Use mdns-scan for a quick inventory of DNS-SD service types, then use Avahi to resolve actual instances, hosts, ports, and TXT metadata. This guide also explains the multicast boundary and why discovery commonly fails across Wi-Fi isolation, VLANs, containers, and firewalls.
A VPN no longer guarantees access to another Netflix catalog, and Netflix may limit a VPN connection to globally licensed titles. This guide explains the network behavior, safe diagnosis, travel and relocation rules, and why old provider-specific instructions should not be trusted.