To fix duplicated packages issue on a Linux system, you'll want to identify and remove the duplicate packages. Here are the steps you can follow:

1. List Duplicated Packages:

   bash

• sudo yum list duplicates

  This command will provide a list of packages that have multiple versions installed.

• Remove Duplicated Packages:

  For each duplicated package, you'll want to remove the older version. Use the following command, replacing <package-name> with the actual package name:

  bash

Example:

• sudo yum remove kernel-2.6.32-754.el6.x86_64

• Reinstall the Correct Version (if necessary):

  If the newer version was removed and you need it, reinstall it with:

  bash
• sudo yum install <package-name>

• Clean Yum Cache:

  bash
• sudo yum clean all

• Update Package Database:

  bash
• sudo yum makecache

• Update the System:

  bash

6. sudo yum update

7. Reboot (if necessary):

   In some cases, especially if the duplicated packages were kernel-related, it's recommended to reboot the system to ensure that the correct kernel is in use.

8. Verify:

   After the process is complete, re-run the sudo yum list duplicates command to ensure that there are no remaining duplicated packages.

Remember to be cautious when removing packages, especially those related to the kernel. Removing the wrong kernel can render your system unbootable. Always ensure you have backups and consider consulting with your system administrator or the vendor's support team for critical issues.