root@ip-172-31-4-108:/etc/init.d# update-rc.d redis-server defaults
//System start/stop links for /etc/init.d/redis-server already exist.

root@ip-172-31-4-108:/etc/init.d# update-rc.d reids_6379 remove
 Removing any system startup links for /etc/init.d/reids_6379 ...

sudo update-rc.d -f <service> remove

sudo update-rc.d <service> enable

/etc/rc.2d/S20<service>