I've installed the Windows 10 Bash subsystem on my Surface 3. I am interested to learn how I can utilize the subsystem. To start, I type bash in the Cortana box and press Enter. 

One thing that has long been frustrating with Windows is the inability to paste text into a command window using Ctrl+V. Windows 10 fixes this by adding Ctrl+C and Ctrl+V support, however that does not translate to the bash subsystem. 

The trick is to be sure to start bash as I describe above as opposed to starting bash from the Windows command line because that way you can right-click to paste into the bash window. 

Right-clicking is not as convenient as a keyboard combination, but it is better than no-support at all. Hopefully some time down the road some will add keyboard short cuts to paste text into the bash window.