avoid syncronising clock and how to dial-up

[Art Alexion]

Neil Woolford wrote:

> At 16:13 04/12/04, you wrote:
>
>> Neil Woolford wrote:
>>
>>>
>>>
>>> The script that calls for the update is /etc/init.d/ntpdate.  This 
>>> is called as part of the later stages of the general boot process by 
>>> a link from /etc/rcS.d/S51ntpdate.
>>>
>>> The are differing views about how to disable such a process...
>>>
>> I have a similar problem.  I don't want to disable the ntp sync, just 
>> delay it.  I use adsl and it connects at boot, but for some reason 
>> the sync attempt occurs before the adsl connection is established.  
>> How can I fix this?
>
>
> This is getting to the edges of my understanding, so check before you 
> do anything based on it;
>
> Ubuntu (and Debian) use what is known as a System V boot system, where 
> a lot of small scripts to set things up are
> stored in /etc/init.d.  The scripts are written to accept parameters, 
> notably 'start' and 'kill' to start and stop processes.
>
> The scripts are called via links in a series of directories /etc/rc?.d 
> where ? is either a capital S or a number representing
> a run-level.  The directory rcS.d contains links to scripts that are 
> run at boot before the run-level is selected, rc2.d (for example)
> contains links to scripts in /etc/init.d that are needed for run-level 2.
>
> Now the bit that counts for determining the order in which things run, 
> which is what interests us to solve your problem.
>
> rcS.d is always run first, followed by the appropriate rc?.d file for 
> the run-level being entered.  Within the rc?.d directories there is
> a strict naming convention;  files start with either an S (start) or a 
> K (kill) and a two digit number followed by the rest of the filename.
> (Such as S51ntpdate.)  The links are activated in  the order of these 
> numbers.
>
> ntpsync is called from rcS.d which is right at the start of the 
> process.  You probably want to deactivate (rename with an underscore
> at the start) that first instance.  Then you'll have to search for the 
> link that sets up the adsl connection, which will be in one of
> the rc?.d directories;  in principle, if you add a (symbolic) link to 
> call ntpdate in the form S??ntpdate where ?? are a two digit number
> higher than that of the script which starts adsl, you will get the 
> desired startup order.
>
> I haven't tried this though, as I use dialup.  All I've done is 
> disable the link to ntpdate as I don't want it called at all.
>
> Hope this helps some.


It's a great start.  Thanks.

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