配置npm使用代理，主要涉及兩個地方加上代理，--registry https://registry.npm.taobao.org
1、_onos-gui-npm-install
2、onos-gui2-fw-npm-install
3、使用源碼安裝完mininet報錯
sudo mn
*** Creating network
*** Adding controller
Cannot find required executable ifconfig.
Please make sure that Mininet is installed and available in your $PATH:
(/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin)
執行sudo apt install net-tools完成後解決