It was originally written for Ubuntu 14.04.2 LTS, but should work on the current version as well.
Is my SDR hardware supported?
Besides RTL-SDR, many other devices work with OpenWebRX (e. g. HackRF, AirSpy, SDRplay, etc.) Check the OpenWebRX wiki for more information.
The source of this post is my previous blog at HA5KFU.