How do I boot from USB on Ubuntu 16.10 with grub2?

Question

Want to shrink my windows partition and then increase the size of my Ubuntu one. I could not find a clear answer already, so I'm asking this.

Answer 1

The easiest way I can think of is to start your computer with live USB (16.04 or any other version). When booting, ensure you say you select to try Ubuntu (not install it). Once it boots, load gparted. From there,

1. Shrink the size of your Windows partition as desired.
2. Once the operation above is done increase the size of the Ubuntu partition.
3. Once the second operation is done, reboot from hard drive (remove USB).

This should do the trick.