FalsinSoft

In case you are working under a restricted network with some particular proxy who have its own secure certificate system is possible you experiment some problem when Java runtime try to download something from an https address. Developing with Android Studio can show the problem cause try to download gradle package at first compilation.

Major mobile systems require you provide a set of image of same icon resized to support different DPI screens. This is a very boring step in develop your app but fortunately it exist some tool able to automatically make the job for us.   

In case you need to modify registry of some PCI devices from Linux user space you can easily do by access to the /proc/bus/pci path where all PCI devices found on the system are listed.