Vagrant box of caliopen avaliable here https://vagrantcloud.com/dey/caliopen_full-ubuntu-14.04
Search and replace in include/_VagrantFile(:
config.vm.provider :virtualbox do |vb|
# # Don't boot with headless mode
# vb.gui = true
#
# # Use VBoxManage to customize the VM. For example to change memory:
vb.customize ["modifyvm", :id, "--memory", "2048"]