If you happen to setup virtual machines to remote server then you might not have good access to graphical interface to use the VirtualBox graphical interface but you have to be able to manage using CLI. This gives you even more flexibility but needs some time until you can figure out what and how to do.
First create virtualmachine and register it with virtualbox.
VBoxManage createvm --name myvirtmachine --register
Create harddisk for this virtualmachine
VBoxManage createhd --filename myvirtmachinedisk --size 100000
Set some useful params for tis virtual machine
VBoxManage modifyvm myvirtmachine--ostype Ubuntu_64 --memory 2048 --cpuhotplug on --cpus 2 --nic1 bridged --bridgeadapter1 eth0
Create storage controller for virtual machine
VBoxManage storagectl myvirtmachine --name myvirtmachinestoragectl --add sata
Attach installation media into DVD drive to this storage controller. In this case i have downloaded previously the ubuntu isntaller CD
VBoxManage storageattach myvirtmachine --storagectl myvirtmachinestoragectl --port 0 --type dvddrive --medium ../ubuntu-12.04-server-amd64.iso
Attach HDD to this storage controller
VBoxManage storageattach myvirtmachine --storagectl myvirtmachinestoragectl --port 1 --type hdd --medium myvirtmachinedisk.vdi
Now you are ready to start the VM. First command is without vnc access, another has vnc access and you can get the access to console by opening vnc session to host machine.
VBoxHeadless -startvm myvirtmachine --vrde off VBoxHeadless -startvm myvirtmachine --vnc --vncpass 12345
