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Additional information. We must change the following as well.
1. The hostname
2. NIC MAC address
3. NIC IP address
4. Any item employing a UUID.
5. Machine ID
6. Configuration settings on the clone that employ any item in the list above
Yes, C and E are right
The recommendation is to ensure the D-Bus Machine ID is unique.
https://wiki.debian.org/MachineId#:~:text=The%20machine%20id%20is%20something%20that%20is%20frequently%20missed%20to%20change%20when%20cloning%20a%20machine
https://unix.stackexchange.com/questions/402999/is-it-ok-to-change-etc-machine-id
https://askubuntu.com/questions/1179897/ubuntu-18-04-guests-which-cloned-by-virtualbox-have-the-same-ip-but-different-ma
For security reasons, E SSH host keys must not be duplicated
https://blog.technodrone.cloud/2013/01/the-ssh-key-problem-with-cloned-linux.html
Below link states all
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/cloning_virtual_machines
Machine ID is a unique hexadecimal 32 character string given to your machine during installation. So it should be changed if the machine is cloned to prevent duplicate ID on a network.
SSH keys are unique to each server/client and also should be changed to securely SSH
As for D, don't see this being something that necessarily needs to be changed.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_virtualization/cloning-virtual-machines_configuring-and-managing-virtualization#:~:text=Note%20that%20disk%20images%20for%20VMs%20created%20in%20the%20system%20connection%20of%20libvirt%20are%20by%20default%20located%20in%20the%20/var/lib/libvirt/images%20directory%20and%20owned%20by%20the%20root%20user
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