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How to upgrade VirtualBox 4.0.12 to 4.1.4 on Ubuntu 11.04

Oracle released VirtualBox 4.1.4, a maintenance release of VirtualBox 4.1 which improves stability and fixes regressions, on Oct 3rd, 2011. Using 'sudo apt-get update' and 'sudo apt-get upgrade' will not upgrade your Oracle VirtualBox (https://www.virtualbox.org/) from 4.0.12 to 4.14. To upgrade:
  1. Backup your virtual machine by press <ctrl>-E to export appliance
  2. Go to Ubuntu Software Center to uninstall current version
  3. Install new version Oracle VM VirtualBox 4.1.4
  4. Install Oracle VM VirtualBox Extension Pack
  5. Run virtual machine and apply new version of Oracle VM VirtualBox Guest Addition 4.1.4r74291
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