By this time, others around him at the University of Helsinki began to take notice. They thought the project was great, and asked Torvalds if they could take Linux home and install it on their own computers. This began the revolution we know today. Linux has come a long way since its humble beginnings. There are many GUIs, or graphical user interfaces for Linux, which work much like Microsoft Windows 3.1 did when it was layered on top of the DOS system.
Users are able to have two levels of interaction.
The command line setting is useful for performing text commands quickly, and the X-Windows setting provides the user with a complete computing environment like MacOS or Windows. Since Linux was written using a UNIX base, the system is very stable, causing it to crash less often than other operating systems, like Windows and Macintosh. Some Linux systems have run for months or years without crashing or needing to be rebooted since Linux's networking code was originally based on the Berkeley UNIX code, the foundation of most modern UNIX operating systems and Internet protocols today. There are fewer Linux software products for sale than with other operating systems. The reason for this is that Linux and most of the software written for it is covered under what's known as the GNU General Public License, which guarantees free use of the software.