https://github.com/audreyt/ethercalc
https://blog.csdn.net/quantum7/article/details/104344633
https://blog.csdn.net/quantum7/article/details/104344092
sudo npm i -g ethercalc
# 启动redis
# redis-server &
# 安装成功?
whereis ethercalc
ethercalc: /usr/local/bin/ethercalc
ethercalc
浏览器中输入:http://127.0.0.1:8000