How to determine Linux guest VM virtualization technology

There are a few different ways to determine the virtualization technology being used for a Linux guest virtual machine (VM) on a host system. Here are a few methods you can try:

1. Use the virt-what command: The virt-what command is a simple tool that can be used to determine the virtualization technology being used for a Linux guest VM. To use virt-what, you can run the following command on the guest VM:

$ virt-what

This command will return the name of the virtualization technology being used for the VM, such as "kvm", "vmware", or "xen".

2. Check the /sys/class/dmi/id/product_name file: On some systems, the virtualization technology being used for the guest VM may be indicated in the /sys/class/dmi/id/product_name file. You can check this file by running the following command on the guest VM:

$ cat /sys/class/dmi/id/product_name

This command will return the name of the host system's motherboard, which may indicate the virtualization technology being used. For example, a "KVM" string in the output may indicate that the VM is running on a KVM host.

3. Check the system logs: The virtualization technology being used for the guest VM may also be indicated in the system logs. You can check the system logs by running the dmesg command on the guest VM and looking for any references to virtualization or hypervisor technologies.

These are just a few examples of how you can determine the virtualization technology being used for a Linux guest VM. The specific steps may vary depending on the distribution and version of Linux that you are using, as well as the specific virtualization technology being used. You can refer to the documentation for your Linux distribution and virtualization technology for more information on how to determine the virtualization technology being used.