$ capstan help run
NAME:
run - launch a VM. You may pass the image name as the first argument.
USAGE:
command run [command options] [arguments...]
DESCRIPTION:
OPTIONS:
-i image_name
-p 'qemu' hypervisor: qemu|vbox|vmw|gce
-m '1G' memory size
-c '2' number of CPUs
-n 'nat' networking: nat|bridge
-v verbose mode
-b networking bridge
-f '-f option -f option' port forwarding rules