Appendix B. UBUNTU DESKTOP CDS FOR AMD64, OPTERON, OR INTEL CORE 2 USERS
As I mentioned in Chapter 1, the version of the Ubuntu Desktop CD that comes with this book is designed to work with i386 processors, either in PCs or Intel-based Macs. It will also work with AMD64 or Intel Core 2 processors, albeit not in 64-bit mode. In order to use Ubuntu with these processors (or any other machine based on AMD64 or EM64T architecture) in 64-bit mode, you must get a different disc on your own. There are several ways of doing this: downloading an ISO (disc image) and then burning it to CD yourself, ordering the CD from Ubuntu (for free), or ordering it from ...
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