vbox.sh

# ...
name="linux"
base="$HOME/.vm"
disk="$base/$name/$name.vdi"

# Create and register the virtual machine.
VBoxManage createvm --name "$name" --basefolder "$base" --register

# ...
VBoxManage modifyvm "$name" --ostype Linux_64
VBoxManage modifyvm "$name" --cpus 1
VBoxManage modifyvm "$name" --memory 4096

VBoxManage modifyvm "$name" --firmware bios
VBoxManage modifyvm "$name" --boot1 dvd
VBoxManage modifyvm "$name" --boot2 disk

VBoxManage modifyvm "$name" --nic1 bridged
VBoxManage modifyvm "$name" --nictype1 82540EM

VBoxManage modifyvm "$name" --audio none

# ...
VBoxManage createhd --filename "$disk" --size 8192
VBoxManage storagectl "$name" --name "IDE Controller" --add ide
VBoxManage storageattach "$name" --storagectl "IDE Controller" --port 0 --device 0 --type hdd --medium "$disk"

# ...
url="http://mirror.rackspace.com/archlinux/iso/2015.07.01/archlinux-2015.07.01-dual.iso"
iso="/tmp/archlinux-2015.07.01-dual.iso"

# ...
curl -o "$iso" "$url"
VBoxManage storageattach "$name" --storagectl "IDE Controller" --device 0 --port 1 --type dvddrive --medium "$iso"

# ...
# VBoxManage modifyvm "$name" --dvd none