The installation process for Red Hat Linux 6.1 includes the ability to
upgrade from prior versions of Red Hat Linux (2.0 through 6.0, inclusive) which
are based on RPM technology. Upgrading your system installs the modular
2.2.x kernel as well as updated versions of the packages that are
installed on your machine. The upgrade process preserves existing
configuration files using a .rpmsave extension
(e.g., sendmail.cf.rpmsave) and leaves a log
telling what actions it took in
/tmp/upgrade.log. As software evolves,
configuration file formats can change, so you should carefully compare
your original configuration files to the new files before integrating
your changes.
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