404: Refers to the visited page does not exist or the file path cannot be found
Here it is necessary to distinguish whether the accessed page is a static page (html) or a dynamic page (php, etc.)
If it is a static page accessing 404, then the file path may be wrong, or the site directory binding error,
At this time, check whether the file path is correct and whether the site domain name binding directory is correct.
If it is a dynamic page 404, then the pseudo-static setting may be wrong, you need to check whether the pseudo-static setting is correct
At the same time, if php does not start normally or runs with high concurrency, it may also cause site 404
At this time, you need to check the running status of php to see if it is running normally