Free lunch—free antivirus software recommendations

There is a saying: There is no free lunch. Viruses and Trojans are rampant on the Internet. Everyone wants to build their computer into an impregnable wall. However, many anti-virus software are paid. Isn’t there any useful free one? The answer is yes. I will list a few good VPSs here one by one. I cannot list them all, I am just here to give you some ideas.
1. Avira AntiVir Personal (Chinese name: Xiaohongsan)

XenServer: XenServer Tools installation (Linux)

I wrote two articles about XenServer in December last year, including installing XenServer and setting up Chicken. During the installation and use process, we will still have small problems of one kind or another. It is not a problem for veterans, but it is more troublesome for novices like a good VPS. Therefore, I will record some fragmentary things, which cannot be called tutorials, just notes.