I have Python script, that is run from Linux(Cent OS).

How can I run this process(script) forever? Or such as it will be re-run after crash?

1 way bash script

while true;
dopython index.py 
done

2 way start python script

import os
while True:os.system("python index.py")

3 way from external python script import index.py and then start external script.