Open Source One

Since Ubuntu and other Linux Distros are free to download and distribute. Would it be illegal for me to have a Small Business of my own that would charge individuals/small-businesses to Install and Setup Linux desktops. I wasn’t sure how that GPL license worked. I figured I would be charging individuals for setting up Linux Desktops on their machines or small business/offices and training/teaching them on the various applications they could install on their own.

Also, would it be illegal to create websites using Apache, Tomcat and other Open Source tools and then sell those sites.

I figured many people are turned off by learning or installing something other than Windows desktops on their pcs, just because it is different.

If this cannot be done under the GPL license, then could someone tell me how I could go about starting my own small business to legally Setup/Install Linux distributions.

Thanks,