Linux systems are an elusive quarry. The prevailing assumption is that when you purchase a new system, you want Windows. That isn't always the case. In addition, while it's much easier to find factory-produced Linux systems than it was just two years ago, it's still no easy task. This list of seven Linux hardware-compatible server manufacturers want you to know about their products.
It is important to bear in mind that although Linux is free, support isn't. Therefore, have an idea of the type of system you want, then make the toll-free phone call to ensure it's correct. Give the telephone support technician as much information as you can about the purpose, number of users and performance needs of the systems you're ordering. Life will be so much better if you do.