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But after I reconfigure the virtual box to only have one CPU, the problem was just gone. Excerpt
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Desktop resolution (Installing Guest Additions)
By default the resolution only went to as higher as 1024 x 768, and the Unity desktop environment does not work.
Solution in short: Install Guest additions, Enable 3D of the VirtualBox settings, install virtualbox-ose-guest-x11 in guest OS.
http://www.virtualbox.org/manual/ch04.html
sudo apt-get install .Some details:
No Format apt-get install dkms
- Start the virtual machine.Select "Install Guest Addtions" from the "Devices" menu in the virtual machine's menu bar.
- In the guest Linux, a CD will mount and autorun. Follow the instructions.
You can also install the virtualbox-ose-guest-x11
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Some details:
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- package from the Ubuntu package manager but it's better to install the Guest Addition from the VirtualBox tool itself.
Use Shared Folders (ref)
- You can add shared folders and give each of them a name from the settings of the VirtualBox or from a folder icon at right bottom of the virtual machine window.
- in the guest Linux, use mount command to mount the folder: sudo mount -t vboxsf sharename /mnt