Notes from Upgrading to Ubuntu 12.04 from 10.04

The new VMs

Upgraded the VM instance by swapping in an Ubuntu 10.04 image (the pre-upgrade version) and installing a new 12.04 i386 install. Special things I did:

• Used a hardware type that supports virtualization - pc2133
• Used tb-allow-external to allow the Ubuntu install to proceed. It expects external connectivity.
  • I added the Ubunutu 10.04 image to the list of images allowed to access external hosts temporarily to do this
• The image file itself was created using

$ qemu-img create -f qcow2 /tmp/pangolin.img 10G

To do the install on an X window I needed to log into the DETER node hosting qemu using

$ ssh -Y pc055

Once I had a bootable image, I booted it, logged in, and changed /etc/apt/sources.list to point to scratch instead of the various ubuntu and cannonical sources. After the substitutions there were 2 duplicates that I commented out.

The defaulty /etc/resolve.conf doesn't resolve scratch, so I copied one from the host on which QEMU was running.

After this sudo apt-get update succeeds.