systemctl disable httpd
Running systemctl disable removes the symlink to the service in /etc/systemd/system/*
systemctl status httpd
systemctl list-unit-files
systemctl start application.service
systemctl list-units –type=service
systemctl list-units –all –state=inactive
systemctl mask nginx.service
systemctl unmask nginx.service
systemctl edit nginx.service
To remove any additions you have made, either delete the unit’s .d configuration directory or the modified service file from /etc/systemd/system. For instance, to remove a snippet, we could type:
sudo rm -r /etc/systemd/system/nginx.service.d
To remove a full modified unit file, we would type:
sudo rm /etc/systemd/system/nginx.service
After deleting the file or directory, you should reload the systemd process so that it no longer attempts to reference these files and reverts back to using the system copies. You can do this by typing:
sudo systemctl daemon-reload
very usefull
https://www.digitalocean.com/community/tutorials/how-to-use-systemctl-to-manage-systemd-services-and-units