update-rc.d : Install init script links
[SYNOPSIS] update-rc.d OPTION SERVICE ACTION
ACTION
defaults Create service start links for runlevels 2,3,4,5
ex. # update-rc.d sshd defaults
remove Delete all service launch links
ex. # update-rc.d sshd remove
start stop Create a link to start a service by explicitly specifying the runlevel and startup order
ex. # update-rc.d sshd start 20 2 3 4 . stop 20 0 1 6 .
OPTION
-n Testing. Shows actual behavior but does not execute it
-f Force removal of symbolic links