Usually, when cloning VMs on virtualized systems (Hyper-V or VMware, for example) an issue could occur related to vNICs: a vNIC could be renamed and so no more the same of the old VMs (obviously). The cloning process force us to re-generate the UUID and specify it into the related network-scripts on CentOS and RHEL systems.
UUIDs (Universal Unique Identifier) for network interface card can be generated using the following command:
Then you can add it to our NIC config file (assuming your interface is eth0):
Let’s locate the NIC configuration file in the following path:
Add/modify the following:
In the NIC configuration file, the option we will have to specify the new UUID (also check the device name value) is the following: