A few days before the May Day holiday, I found that MySQL errors occasionally appear when I open the website, but you can refresh normally. At first, I thought that there was a problem with the browser, but I didn't care about it. As a result, during the May Day holiday, QQ friends told me that my website could not be opened, and then I knew that it was really a failure. Previously, I used Win+iis, the Guardian host software. I had long wanted to change it to Linux, but I was too lazy to change it. It was too inky. I just took this opportunity to try again, but I encountered a problem of losing it. The website server was poisoned, which caused all the disk space to be occupied. The display was 0 bytes. It was impossible to check and kill viruses, and the software could not be installed, I can only back up and delete some useless things first. I accidentally found that every website