I have a working Ubuntu 8.04 64bit server, that has an old copy of Xen on it. It's showing release: 2.6.24-23-xen, and I'm not sure how to get the actual Xen version. Info shows "xen_caps: xen-3.0-x86_64 xen-3.0-x86_32p" but I don't know if that's the version. I also want to increase the amount of physical RAM I have from 2Gb to 4Gb. When I ran aptitude safe-upgrade I get this in the results: Code: The following packages have been automatically kept back: linux-xen The following packages have been kept back: linux-image-server linux-image-xen linux-restricted-modules-xen linux-server 0 packages upgraded, 0 newly installed, 0 to remove and 5 not upgraded. Need to get 0B of archives. After unpacking 0B will be used. Has anyone had any problems upgrading Xen, and ran into something like this? Also, after I add the extra 2Gb of RAM, I'm guessing I only need to change the .cfg file for my dom1 so the memory = '1282' setting is increased to whatever is available after the upgrade, then restart it?