[Q] Best location of ntpd driftfile ?
cswiger at mac.com
Sun Mar 21 09:34:26 PST 2004
On Mar 21, 2004, at 1:30 PM, Stefan A. Deutscher wrote:
> setting up ntpd, I find that its default location for the drift file
> is /etc/ntp.drift.
Right, and that is probably the best location, too.
> In a way it is part of the configuration an may well belong in /etc, on
> the other hand I'd rather just have files in /etc which _I_ modify.
At one point (15 years ago :-), some people used to modify the contents
of ntp.drift by hand.
This was for machines which were not connected to a network; by keeping
track of the system time drift against an external time reference
source over the course of a few weeks, one could compute the right
value for ntp.drift and then run ntpd to correct that drift.
> I would expect the content of ntpd.drift to vary over time,
ntp.drift normally converges and stabilizes after a while (a few days
to a few weeks), unless the hardware clock is bad.
> and somehow I would have expected it to belong in the /var part of the
> hierarchy, but 'man hier' does not offer any serious evidence (should
> it be
Hmm. Well, ntpd predates the notion of /var, but you could put the
drift file under there if you wanted to. I think keeping DNS zone
files under /var/named makes a lot more sense than under /etc/named,
for instance, but I wouldn't move ntp.drift out of /etc myself.
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