Re: /etc/prelink.cache

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 <rstevens@xxxxxxxxxxxx> 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 rstevens@xxxxxxxxxxxx -
- 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 rstevens@xxxxxxxxxxxx -
- CDN Systems, Internap, Inc. http://www.internap.com -
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- The gene pool could use a little chlorine. -
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