If you follow Linux news at all, you know that Ubuntu gets a lot of attention, both positive and negative. If you put five Linux fans together in a room, you'll have a hundred opinions and no agreement on anything, so don't let geek controversies bother you. It's what we do.
Ubuntu Server is a serious server operating system for small businesses that have a good system and network administrator. It doesn't do much handholding, but it is tuned for server work, and it offers a wealth of options so you can tailor it exactly the way you want it.
It starts with a free open source download. There are no hoops to jump through, no registration or salespeople. Just download and install it. One of Ubuntu's best features is that it has multiple versions (desktop, Server, Xubuntu, Edubuntu, Mythbuntu, and Lubuntu), and all of them are compatible and use the same software repositories.
No matter which Ubuntu version you're using, you can install any Ubuntu software. Ubuntu's community support is first-rate, thanks to its huge user base and friendly community. Canonical, Ubuntu's parent company, offers professional support at various levels including: Ubuntu Cloud integration, the Landscape systems management service, training, virtualization, and integration with multiple commercial cloud services.
If you're looking for long term support, look no further; Ubuntu releases are supported for five years, and the Ubuntu release schedule is mapped out several years in advance so you know what to expect.