Solve : How to delete the old ethernet address device path on Red Hat

1.	Solve : How to delete the old ethernet address device path on Red Hat Enterprise Linux?
Answer» I have the two question about performance and HARDWARE device path 1. I face the problem about the network card device path, I find some of the path is not in use, and want to delete them . Let me TAKE the sample: The old ethernet ADDRESS is in use eth0, but it is not in use in future. I want to ADD the new card assign the eth0. how can I delete and assign to new device. 2. How to CHECK the history of performance for Disk and Memory ?

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