What purpose does an .ok file serve in MRTG?

Question

I'm new in mrtg and I can't find what the .ok files do in a mrtg system. Could you help regarding this doubt?

Possible duplicate of How can I get help on terminal commands? — Melebius, May 23 '18 at 09:17
@Melebius Oh, don’t let Zanna see this… ;) Seriously, I don’t think this other question is of any help here, the manpages etc. contain even less information on this exact matter than the online documentation. — dessert, May 23 '18 at 10:07

score 3 · Accepted Answer · answered May 22 '18 at 11:15

As even the official documentation doesn’t explain it I can only speculate, but there are some hints here:

--confcache-file filename
       Use an alternate confcache-file (the default is to use the
       configuration-file appended with ".ok")

--fhs
       Configure all mrtg paths to conform to the FHS specification.
       The following default values are assumed:

       confcachefile - /var/cache/mrtg/mrtg.ok
       pid-file      - /var/run/mrtg.pid
       lock-file     - /var/cache/mrtg/mrtg.lck
       log-file      - /var/log/mrtg.log

The .ok file seems to be a cache file holding the mrtg configuration, by default the .ok extension is just appended to a copy of the configuration file, but you may specify an own .ok file using the --confcache-file flag. If you use the --fhs option, the config cache file will be saved as /var/cache/mrtg/mrtg.ok.

What purpose does an .ok file serve in MRTG?

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