f7fcab81_eeBSD_vs_Linux_vs_Windows_2000__Linux
[0] Support [FreeBSD] Several organizations, including BSDi, offer a wide range of support options for FreeBSD. In addition to 24x7 professional support, there is a large amount of free, informal support available through Usenet newsgroups and mailing lists, such as questions@freebsd.org. Once a problem is found, source code patches are often available within a few hours. [Windows 2000] Although support is available for Windows 2000, you should be prepared to spend as long as an hour on hold, with no guarantee that your problem will be resolved. Because of the closed source nature of Windows, there is no informal, free support available, and bugs are fixed on Microsoft's schedule, not your's. Since Windows 2000 is not updated frequently, you may wait years for bugs to be fixed. [Linux] 
Many organizations provide professional support for Linux. All the major Linux vendors offer some level of support, and several offer full 24/7 service. There are many forums where Linux questions are answered for free, such as newsgroups and mailing lists. As a last resort, you can always use the source to track down and fix a problem yourself.
FreeBSD vs Linux vs Windows 2000
Linux