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DESCRIPTION

update-rc.d updates the System V style init script links /etc/rcrunlevel.d/NNname whose target is the script /etc/init.d/name. These links are run by init when it changes runlevels; they are generally used to start and stop system services such as daemons. runlevel is one of the runlevels supported by init, namely, 0123456789S, and NN is the two-digit sequence number that determines where in the sequence init will run the scripts.

To start the script folding in runlevels 0123 and stop in 456, run (as root):

   $ update-rc.d folding start 0123 stop 456

usage:

       update-rc.d [-n] [-f] <basename> remove
       update-rc.d [-n] <basename> defaults|multiuser [NN | sNN kNN]
       update-rc.d [-n] <basename> start|stop NN runlvl [runlvl] [...] .
                -n: not really
                -f: force

root@shibu-laptop:~# update-rc.d -f mysql remove
 Removing any system startup links for /etc/init.d/mysql ...
   /etc/rc0.d/K20mysql
   /etc/rc1.d/K20mysql
   /etc/rc2.d/S20mysql
   /etc/rc3.d/S20mysql
   /etc/rc4.d/S20mysql
   /etc/rc5.d/S20mysql
   /etc/rc6.d/K20mysql
root@shibu-laptop:~# cd /etc/init.d
root@shibu-laptop:/etc/init.d# ./mysql
mysql          mysql-ndb      mysql-ndb-mgm
root@shibu-laptop:/etc/init.d# update-rc.d -f proftpd remove
 Removing any system startup links for /etc/init.d/proftpd ...
   /etc/rc0.d/K50proftpd
   /etc/rc1.d/K50proftpd
   /etc/rc3.d/S50proftpd
   /etc/rc4.d/S50proftpd
   /etc/rc5.d/S50proftpd
   /etc/rc6.d/K50proftpd
root@shibu-laptop:/etc/init.d# update-rc.d -f vsftpd remove
 Removing any system startup links for /etc/init.d/vsftpd ...
   /etc/rc0.d/K20vsftpd
   /etc/rc1.d/K20vsftpd
   /etc/rc2.d/S20vsftpd
   /etc/rc3.d/S20vsftpd
   /etc/rc4.d/S20vsftpd
   /etc/rc5.d/S20vsftpd
   /etc/rc6.d/K20vsftpd

Update-rc