How many times have you been on the go and discovered that you needed to pull off some Linux-fu, but the only piece of tech you had was an Android device? Imagine if you were able to fire up a Linux command prompt on that device and make use of apt-get to install whatever command line tool you needed. Wget? No problem. Traceroute? Yes. Ssh? Absolutely. Just about any tool you can install on Linux, you can install within Android. Even some graphical apps will work (even though command line tools work best).