Mininet is a lightweight container orchestration system that is specialized for network emulation. With Mininet and onos.py, you can easily start up an ONOS cluster, and a modeled data network for any topology you might like, in a single VM or server. This is usually the most convenient way to create an ONOS development environment on your laptop, and you can be up and running in a matter of minutes (or seconds if you have already built ONOS and have already installed Mininet!)
unified console ：统一控制台；Prerequisites：先决条件，前提；
获得root权限：su -(如果第一次设置root，需要先设置密码，输入命令： sudo passwd root)，使用exit退出root。
获取mininet：
方法一，sudo apt-get install mininet bridge-utils
方法二，git clone http://github.com/mininet/mininet
mininet
/util/install
.sh -nvfw