I started a Vagrant box from https://cloud-images.ubuntu.com/vagrant/trusty/current/trusty-server-cloudimg-i386-vagrant-disk1.box. For some reason, this box does not seem to include usbserial and ftdi_sio modules by default. How to install them?
I have verified that modules are really missing with
modprobe usbserial throws
modprobe: FATAL: Module usbserial not found. (as it does with