linux系统后台运行python, 关闭shell后不会中断

https://cloud.tencent.com/developer/article/1398550

只输出错误信息到日志文件 
nohup ./program >/dev/null 2>log & 
什么信息也不要 
nohup ./program >/dev/null 2>&1 & 

nohup python3 f.py > /dev/null 2>&1 &