I am using Ubuntu Server 12.04.2 LTS installed on Amazon EC2, architectue x86_64 with m1.medium machine type.
To install virtualbox I did
sudo apt-get install virtualbox
Now,
vagrant init precise32 http://files.vagrantup.com/precise32.box
vagrant up
always halts saying
Bringing machine 'default' up with 'virtualbox' provider...
[default] Box 'precise32' was not found. Fetching box from specified URL for
the provider 'virtualbox'. Note that if the URL does not have
a box for this provider, you should interrupt Vagrant now and add
the box yourself. Otherwise Vagrant will attempt to download the
full box prior to discovering this error.
Downloading or copying the box...
Extracting box...te: 8240k/s, Estimated time remaining: --:--:--)
Successfully added box 'precise32' with provider 'virtualbox'!
[default] Importing base box 'precise32'...
[default] Matching MAC address for NAT networking...
[default] Setting the name of the VM...
[default] Clearing any previously set forwarded ports...
[default] Creating shared folders metadata...
[default] Clearing any previously set network interfaces...
[default] Preparing network interfaces based on configuration...
[default] Forwarding ports...
[default] -- 22 => 2222 (adapter 1)
[default] Booting VM...