Screen for running long-time script in terminal

If you are using terminal(ssh or something) and you want to keep a long-time script working after you log out from the terminal, you can try this:

screen

apt-get install screen

create a virtual terminal inside( namely abc): screen -dmS abc

now we connect to abc: screen -r abc

So, now we can run python script: python Keep_sending_mail.py

from now on, you can directly close your terminal, however, the python script will keep running rather than being shut down

Since this Keep_sending_mail.py's PID belong to the virtual screen rather than the terminal(ssh)

If you want to go back check your script running status, you can use screen -r abc again