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Remember that your Linux VM is a simulated virtual computer running on your host system, and it should logically behave just like a regular Linux computer
See the Power off the machine option above
If the host is correctly connected to the network, but you can't access the network from the VM and you get the following kind of ssh error message from the VM:
ssh user@machine
ssh: Could not resolve hostname machine: Name or service not known
You can reboot the VM, or more simply just restart the network (in the VM), with the following:
sudo service network restart
The following settings can probably be done with any Linux environment, but the precise details below apply to the Cinnamon window manager