Re: /etc/prelink.cache

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On Wed, 2007-10-31 at 11:29 -1000, Dave Burns wrote:
> I could hear this as either "this file changes too unpredictably, go
> ahead and ignore it" or "this file only changes when something
> significant happens, it will be a good signal of bad activity,
> assuming you keep track of your valid system changes such as yum
> updates."

That's the ticket for prelink.cache.  If it changes, there was a change
to the system that (can) be important...something in the system
libraries (or their directories) changed.

> So let's be very explicit. If I never updated my system or installed
> new software ever again, would /etc/prelink.cache ever change? Is it a
> canary or a cuckoo bird?

If you NEVER update the system or install new packages, the _content_
shouldn't change.  The atime may change since I think it's scanned by
prelink, but I won't swear to that.

> On 10/31/07, Rick Stevens <[email protected]> wrote:
> > On Wed, 2007-10-31 at 08:51 -1000, Dave Burns wrote:
> > > idea? Are changes to this file more predictable than I am supposing?
> >
> > There are a number of files that will change depending on system
> > activity and that's one of them.  Lots of the files in /var/log will
> > also change (messages, dmesg, boot.log, wtmp, you get the idea).
> >
> > prelink is run once a day via the system crontab and its control file
> > /etc/cron.daily/prelink.  The cache will change if system libraries are
> > updated via yum/rpm or you build something that adds libraries to the
> > normal system directories.  This is controlled by /etc/prelink.conf.
> >
> > ----------------------------------------------------------------------
> > - Rick Stevens, Principal Engineer             [email protected] -
> > - CDN Systems, Internap, Inc.                http://www.internap.com -
> > -                                                                    -
> > -  Time: Nature's way of keeping everything from happening at once.  -
> > ----------------------------------------------------------------------
> >
> > --
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> >
> 
----------------------------------------------------------------------
- Rick Stevens, Principal Engineer             [email protected] -
- CDN Systems, Internap, Inc.                http://www.internap.com -
-                                                                    -
-            The gene pool could use a little chlorine.              -
----------------------------------------------------------------------


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