Sometimes RPM databases become corrupt. You will no longer be able to install/upgrade/remove programs using YUM or RPM command. Even RPM quey simply gets hung.This is the case when you need to repair RPM databases.
To repair do the following:
cp -rp /var/lib/rpm{,`data +%F`.bk}
This command is to take a backup of ‘ /var/lib/rpm‘ directory
rm -f /var/lib/rpm/__db*
This command clears the RPM database. Then enter the following command,
rpm -vv –rebuilddb
This command rebuild database in in verbose mode so that you see the process. Now your RPM database is perfect.
You can just check following command to confirm this.
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