sudo update-rc.d celeryd defaults
 Adding system startup for /etc/init.d/celeryd ...
   /etc/rc0.d/K20celeryd -> ../init.d/celeryd
   /etc/rc1.d/K20celeryd -> ../init.d/celeryd
   /etc/rc6.d/K20celeryd -> ../init.d/celeryd
   /etc/rc2.d/S20celeryd -> ../init.d/celeryd
   /etc/rc3.d/S20celeryd -> ../init.d/celeryd
   /etc/rc4.d/S20celeryd -> ../init.d/celeryd
   /etc/rc5.d/S20celeryd -> ../init.d/celeryd