命令:

python
提示:
bash: python: command not found

使用whereis指令，获取python3的路径

whereis python3
提示:
python3: /usr/bin/python3.8-config /usr/bin/python3 /usr/bin/python3.8 /usr/lib/python3 /usr/lib/python3.9 /usr/lib/python3.8 /etc/python3 /etc/python3.8 /usr/local/lib/python3.8 /usr/include/python3.8 /usr/share/python3

如果没有vim命令 就执行下面命令 或者换成vi

apt-get update
apt-get install vim

编辑.bashrc文件

vim  ~/.bashrc 

在如图下添加:

alias python='/usr/bin/python3'

source ~/.bashrc
python

到这里就好啦！