Install new ubuntu 18.04

$ vi /etc/apt/sources.list 

$ sudo apt-get update

$ sudo apt-get install vim

$ sudo apt-get install net-tools

$ sudo apt-get install openssh-server

创建用户，修改权限。

https://blog.csdn.net/CAU_Ayao/article/details/83502880

$ sudo apt install python-pip

$ pip install sklearn