Updating RPM's

Just a quick question about updating installed RPM's. When using rpm -Uvh <package_name>.rpm , this will update the existing installed rpm without modifying existing configurations correct? My main concern is sendmail. If I use -Uvh, I want to make sure that it keeps everything intact and just updates it for security reasons.
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spwbotConnect With a Mentor Commented:
Make a backup of your sendmail configurations files /etc/sendmail.conf and all the directory /etc/mail
because, sometimes, the rpm Uvh command, change your configuration file with something like this:

Or something like that. You need to rename or put your saved files in the etc and in the /etc/mail directory and restart the sendmail to get your original configuration again.

Acutually when updating via an rpm you should use 'rpm -Fv <pkg>'. But either method can install new config files (like sendmail.cf in this case). In those cases where there is a clash rpm normally either installs its version of the config file as some-file.rpmnew or saves your copy as some-file.rpmsave or  similar. If you want to be completely safe, save a copy of all of the critical files (/etc/aliases, /etc/sendmail.cf, and /etc/mail/*) before upgrading. If you are running 7.0 or later the new version of sendmail is close enough to what you have now that you should be able to use your existing sendmail.cf as-is.
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