What is "centos"

Centos, short for Community Enterprise Operating System, is an Enterprise-class Linux distribution derived from free source code distributed by Red Hat Enterprise Linux and maintained by the Centos Project. Centos has been named one of the best distros for server use. Centos has numerous features, including: an active and growing community, rapid development and testing of packages, an extensive network for downloads, accessible developers, multiple support channels including Portuguese support and business support through partners.

Architectures

Centos is available on the same architectures as Red Hat Enterprise Linux:

• IA-32 (x86) - 32-bit
• Intel Itanium (IA-64)
• x86-64 (AMD64 and Intel EM64T)
• Powerpc/32 (Apple Macintosh and Powermac with G3 or G4 Powerpc processor)
• IBM Mainframe (eServer zSeries and S/390), not supported since Centos 5

Link to official page: Link