what this system alert means: (hackcheck) mount failed checksum test

I received this system alert message:

Subject: [hackcheck] mount failed checksum test

IMPORTANT: Do not ignore this email.
This message is to inform you that the rpm
package mount did not match the expected checksum. This could mean that
your system was compromised (OwN3D). The offending files have been removed
and replaced with the OS default. To be safe you should verify that your
system has not be compromised.




What does this mean? Has my system been compromised? What should I do?

thanks

 

 

 

 

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