https://websofttechs.com/tutorials/how-to-setup-python-script-autorun-in-ubuntu-18-04/
$chmod 777 your_script.py
[Unit]
Description=wordcloud check process
[Service]
Type=simple
ExecStart=/wordcloud_ap/anaconda3/envs/crawling/bin/python3.7 /wordcloud/wc1_check_process.py
[Install]
WantedBy=multi-user.target
$systemctl daemon-reload
$ sudo systemctl enable your_service.service
$ sudo systemctl start your_service.service