使用pip出现问题
fxd0@ubuntu:~$ sudo pip install virtualenv
 [sudo] password for fxd0:
 env: ‘pip’: No such file or directory
 fxd0@ubuntu:~$ pip insatall virtualenv
Command 'pip' not found, but can be installed with:
sudo apt install python-pip
安装pip
fxd0@ubuntu:~$ sudo apt install python-pip