Do this at your own risk. Modify the default Ubuntu sources.list only if you understand what you're doing.

iwlist scan - shows wireless networks that are available in the area with basic encryption information
lshw -C network - Shows Details of Interface card and drivers of each networking device

lspci -nn - Shows PCI vendor and device codes as both numbers and names of hardware connected to the pci bus
lsusb - Shows USB connected hardware

Here is the content sources.list through which you can install any necessary applications. So delete the whole content of your sources list and replace it with the this content (below).

If you have heard about Ubuntu but are still doubting whether to migrate to it or not, then the following six basic points should help you decide.

Shutter, according to its website is a feature full screen shot program. As a tech blogger experimenting with GNU/Linux and its derivatives, it offers me a number of handy features. In fact, I have replaced it as my default screen shot tool. When I press Print Screen on my keyboard,shutter pops up and does a nice job.

Follow these steps to open files as root user via right click

The users of Ubuntu are the owners of the OS. Everyone can participate in the development of the OS irrespective of their technical skills. They determine what goes into the development of the OS and have a lot of say in the kind of functions that the OS comes out with.