git clone git://github.com/mininet/mininet

cd mininet
cat INSTALL

mininet/util/install.sh [options]

    -a 全部安装，很难成功

    -n3V 2.5.0 安装核心、openflow1.3、openvswitch2.5.0（推荐）

    -n3v 

sudo mn --test pingall

sudo rm -rf /usr/local/bin/mn
sudo rm -rf /usr/local/bin/mnexec
sudo rm -rf /usr/local/lib/python*/*/*mininet*
sudo rm -rf /usr/local/bin/ovs-* /usr/local/sbin/ovs-*
sudo apt-get remove mininet

git clone git://github.com/osrg/ryu.git

cd ryu //进入ryu所在文件夹下
sudo pip install -r tools/pip-requires
sudo python setup.py install

sudo ryu-manager

sudo pip3 install -r tools/pip-requires
sudo python3 setup.py install