openvswitch-switch -y

apt install python-pip
apt-get install git -y 
git clone https://github.com/mininet/mininet.git
cd mininet/
git checkout 2.2.0
git tag
util/install.sh -nf
vi util/install.sh 
util/install.sh -nf
git clone https://github.com/faucetsdn/ryu.git
cd ryu/
pip install -r tools/pip-requires -i https://pypi.tuna.tsinghua.edu.cn/simple

pip install --upgrade  networkx==1.11 -i https://pypi.tuna.tsinghua.edu.cn/simple