rpm-ostree/docs/countme.md

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# DNF Count Me support
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Classic DNF based operating systems can use the [DNF Count Me feature][countme]
to anonymously report how long a system has been running without impacting the
user privacy. This is implemented as an additional `countme` variable added to
requests made to fetch RPM repository metadata. On those systems, this value is
added randomly to requests made automatically via the `dnf-makecache.timer` or
via explicit calls to `dnf update` or `dnf install`.
However, this does not work for `rpm-ostree` based systems as in the default
case (no package overlayed on top of the base commit), `rpm-ostree` will not
fetch any RPM repository metadata at all.
Thus `rpm-ostree` includes a distinct timer (`rpm-ostree-countme.timer`),
triggered weekly, that implement the DNF Count Me functionality in a
standalone way.
## Disabling DNF Count Me on a system
To disable this feature, you need to update the Count Me option in all RPM
repository configuration files:
```
sed -i 's/countme=1/countme=0/g' /etc/yum.repos.d/*.repo
```
You should also stop and disable the `rpm-ostree-countme.timer`:
```
$ systemctl disable --now rpm-ostree-countme.timer
```
[countme]: https://fedoraproject.org/wiki/Changes/DNF_Better_Counting