KVM restarts the network and reports an error
no such file or directory (g-io-error-quark 1)…
The virtual machine created by kvm will restart the computer every time the network service is restarted.
Then enter the interface: 
I checked the log file and checked it online. I suspected that it was a file problem with /etc/fstab. I opened /etc/fstab to check and found that an additional file that did not exist was mounted at that time. I will /etc/ The fstab file has been changed again. After restarting the system according to the prompt, it will return to normal.