PIC: Sangfor engineer and customer's O&M personnel

• Check whether all VMs installed with a guest OS are working and whether there are alerts, suspended, or failed VMs.

• Check whether the guest OS or console of VMs can be accessed and whether the file system works well.

• Check whether all application services are available and running without an unexpected shutdown, restart, etc.

• Analyze the causes of all the anomalies detected above and handle them promptly.