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On Thu, Jul 29, 2010 at 5:15 PM, Jerry Feldman <gaf-mNDKBlG2WHs at public.gmane.org> wrote: > On 07/29/2010 11:27 AM, Dan Ritter wrote: >> On Thu, Jul 29, 2010 at 10:12:01AM -0400, Seth Gordon wrote: >> >>> I have a desktop machine at home that used to run 64-bit Ubuntu. ?Then >>> the hard drive went south, so I got a fresh drive, bought an Ubuntu >>> CD-ROM from the Micro Center, did a fresh install from the CD-ROM, and >>> then upgraded over the network to the then-latest version. >>> >>> At some point I noticed that I was running the 32-bit version of the OS, >>> not 64-bit. ?Is there a relatively painless way to move everything over? >>> ? (I need to upgrade it from 9.10 to 10.04, in any event.) >>> >> Nope. Unlike switching kernels, x86-32 to x86-64 is a complete >> architecture change. >> >> There is no in-place upgrade. Your best bet is to add a disk, >> install 64-bit on that, test things, and move data over. >> >> > You can theoretically do this, but it is a very big job and very easy to > screw things up. > (1) filesystem (not 100% sure here). This is generally not a problem. > (2) kernel > (3) kernel modules - modules are coordinated with the kernel. 3(a) initial ramdisk > (4) libraries. /lib, /lib32, /usr/lib,/usr/lib32, /lib64 /usr/lib64 > (64-bit libs are symlinked to lib). > (5) commands although most 32-bit commands will work in a 64-bit > environment. > (6) stuff I forgot :-) System config in /etc.... > If you create another partition with your home directory, possibly > /usr/local, and possibly some of your downloaded applications you are > preserving most of the stuff you added, then you can do a clean install > by reformatting the boot and root partitions. If you are running a machine as a local server, you might have DHCP, DNS, NTP, and NFS configs to migrate as well. Bill Bogstad
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