Linux friendly shall be built using commodity hardware with enterprise components. Dell, HP and Supermicro all deliver basic servers without too much hassle.

for more information see: hardware design

Servers are to have at least the following hardware (or better):

• 2 CPU with 16 threads each
• 32 GB Ram ECC
• 3 TB Harddisk room in a raid-5 configuration

See for more information: Server specs