Reproducible
engineering
experiments

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.

Prefer `apt install ./package.deb` so Ubuntu can resolve repository dependencies in one transaction. If `dpkg -i` already left packages unpacked or unconfigured, diagnose the exact state, repair it without blind removals, and verify the package database.

BUP is a program that backs things up. It’s short for “backup.” BUP is a Very efficient backup … Read more

A production-oriented Mautic and Amazon SES SMTP setup for shared or managed hosting: align the AWS Region, endpoint, credentials and sender identity; prove TLS egress; queue mail responsibly; and close the bounce/complaint feedback loop.

As per Wikipedia, Beacon frame is one of the management frames in IEEE 802.11 based WLANs. It contains all the … Read more

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.

To disable the ICMP ping from certain Linux host, lets say which has IP of 192.168.0.100 use … Read more

A practical Ubuntu workflow for turning AVI and other supported sources into broadly compatible MP4 video. Use HandBrake’s official Flatpak, choose a preset intentionally, protect the source, and verify video, audio, subtitles, and playback.

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.