Disabling ntpupdate

This has been quite overdue, as I have been wanting to disable ntpupdate since the Hoary release. What is ntpupdate anyway? It's the program that synchronizes your system time to an ntp server. NTP is a protocol for synchronising the clocks of computer systems over packet-switched, variable-latency data networks. Since Ubuntu defaults to an ntp server somewhere in the www, and that it will attempt to sync on boot, it causes your machine to go through a much much longer startup process if an internet connection is not available at boot time.

As I am lugging my lappy around a lot and I have not much of a need for the program, I knew I had to take it out and save me minutes of boot time. Ealden taught me how to remove ntpupdate, and I suppose we can change the arguments to remove other programs as well.

$ sudo update-rc.d -f ntpdate remove

update-rc.d will remove any system startup links for /etc/init.d/ntpdate, or any instances of such in the different run levels. Usage is as follows:

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

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