After doing PreUpgrade on your linux box, you may need to clean-up some configurations that were changed by the newer packages.

  1. Look for files with rpmnew or rpmsave

  2. $ sudo find / -print | egrep "rpm(new|save)$"

  3. Install rpmconf to help you examine the differences of the configuration files much easier.

  4. $ yum install rpmconf

  5. Run rpmconf -a

  6. $ sudo rpmconf -a

  7. Examine each file. Enter 'D' to see the differences between the old and new configuration. Enter 'I' to install the new config. If you're not sure, just enter and accept the default which will not change your current configuration.
Configuration file `/etc/nsswitch.conf'  
-rw-r--r--. 1 root root 1706 Oct 19 2011 /etc/nsswitch.conf.rpmnew
-rw-r--r--. 1 root root 1688 Jul 8 12:44 /etc/nsswitch.conf
==> Package distributor has shipped an updated version.
What would you like to do about it ? Your options are:
Y or I : install the package maintainer's version
N or O : keep your currently-installed version
D : show the differences between the versions
M : merge configuration files
Z : background this process to examine the situation
S : skip this file
The default action is to keep your current version.
*** aliases (Y/I/N/O/D/Z/S) [default=N] ?
Your choice: i