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Update modules/ROOT/pages/dnf-system-upgrade.adoc

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Add info on configuration files which may have changed in unexpected ways.
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Jeffrey Walton 2019-11-01 19:58:31 +00:00
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modules/ROOT/pages/dnf-system-upgrade.adoc
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@ -111,6 +111,11 @@ sudo rpmconf -a
For more information you can refer to the man pages (`man rpmconf`).
[[sect-upgraded-package-configurations]]
== Upgraded package configurations
If you use `rpmconf` to upgrade the system configuration files supplied with the upgraded packages then some configuration files may change. After the upgrade you should verify `/etc/ssh/sshd_config`, `/etc/nsswitch.conf`, `/etc/ntp.conf` and others are expected. For example, if OpenSSH is upgraded then `sshd_config` reverts to the default package configuration. The default package configuration *does not* enable public key authentication, and allows password authentication.
[[sect-clean-up-old-packages]]
=== Clean-Up Old Packages