when trying to install 64 bits linux os in dell server.
In Dell Server turns off Intel’s Virtualization Technology (VT) by default .
To enabling VT(Virtualization Technology) from Bios, do the following....
1) Restart your server and stroke on the F2 key repeatedly to enter BIOS
2) Navigate to the Processor section of the BIOS settings
3) Under Virtualization Technology, change the setting to "Enable"
4) Press ESC and choose to Save/Exit the BIOS
