Dell PowerEdge C6145 - Manual (Page 11)

Getting Started With Your System | 11
Complete the Operating System Setup
To install an operating system for the first time, see the installation and
configuration documentation for your operating system. Be sure the operating
system is installed before installing hardware or software not purchased with the
system.
Supported Operating Systems

Microsoft Windows HPC Server 2008 R2 (64-bit)

Microsoft Windows Server 2008 Core R2 (64-bit)
 Microsoft Windows Server 2008 R2 Hyper-V
 Microsoft Windows Server 2008 R2 Enterprise (64-bit)
 Red Hat Enterprise Linux 5.5 (64-bit)

Red Hat Enterprise Linux 6.0 (Certification only)
 SUSE Linux Enterprise Server 11 SP1 (64-bit)
 VMware ESX Server 4.1 U1 and ESXi Embedded
 Citrix XenServer 5.6 Feature Pack 1
NOTE: For the latest information on supported operating systems, see
support.dell.com.