Hacker is not a bad word

Usually the word "hacker" is associated with doing "bad" things. But it need not be.Knowing guts and bowels of a system or network, get inside it, is what a hacket can also mean.

in reference to:

"how to learn the guts and bowels of a system or network, get inside it,"
- How to Become a Hacker (view on Google Sidewiki)