{ "builders": [ { "type": "virtualbox-iso", "vm_name": "box", "boot_wait": "10s", "disk_size": 512000, "guest_os_type": "RedHat_64", "iso_checksum": "4a5fa01c81cc300f4729136e28ebe600", "iso_checksum_type": "md5", "iso_url": "http://ftp.iij.ad.jp/pub/linux/centos/6.4/isos/x86_64/CentOS-6.4-x86_64-minimal.iso", "ssh_username": "vagrant", "ssh_password": "vagrant", "ssh_port": 22, "ssh_wait_timeout":