Install AusweisApp from the AUR on CachyOS, then add one UFW broadcast rule so "Smartphone als Kartenleser" pairing actually sees the phone.

Web UI caps the threshold at 70°C. Router idles at 65°C. Here's how to override the fan config over SSH when you suspect heat is causing random restarts.

Adding 7.5 GB of swap via microSD to solve Out of Memory crashes when running AdGuard Home with large blocklists.

Converting an Auerswald COMpact 5020 telephone system from ISDN to VoIP, expanding from 2 to 8 channels.