Systemctl enable yourservicename.service

Created symlink /etc/systemd/system/multi-user.target.wants/ yourservicename.service → 
/lib/systemd/system/yourservicename.service.

Systemd services: systemctl [status | is-active | start | daemon-reload | stop | mask | reload | restart | reboot | enable | disable | cat], systemctl list-units, systemctl list-timers, systemctl --failed, systemctl get-default, systemctl --help, .service, .timer, .socket, systemctl restart elasticsearch.service, systemctl status apt-daily, systemctl status oscapd