This is really annoying, with Windows it would ask whether you give permission for it to make changes to your hard drive. This is even more annoying as when I install a program, it asks me to type in my password.
Why does it do this?? Clearly it is me and my computer so why on earth does it prompt me for my password every time, it is so utterly annoying. Is there a way to turn it off so it doesn't prompt me every time?
sudo
mechanism is being used. Search about sudo and you should come to understand it quickly. As for your side question, this is a Stack Exchange, question and answer site, questions get marked as duplicate so that people can be directed to the best answer possible, rather than having loads of exactly the same question, with differing answers of variable levels of quality.