What would be the thing to consider in making multiple copies of Linux as VM ? in Windows i know there is sysprep to generate random SSID and make it unique copy. Can anyone share it here please ?
Make sure the latest vmtools are installed and your time-sync choice is in and working fully. I'd also be tempted to put chef or puppet in too.
Depending on how paranoid you probably want to regenerate your SSH host keys, it isn't required but the more copies of your host keys that exist, the more likely they are to be compromised making a MITM attack possible.
If the VMs are joined to a Windows domain you will need to change the name and rejoin the domain using the alternate name.
There may be other service specific things to fix, but you haven't told us much about what are running on these VMs.