A 404 error occurs in the WordPress backend under nginx environment. How to solve it?

I have been using AMH4.2 for some time, and a 404 error occurred when logging into the backend after setting up pseudo-static. The solution is: AMH-wordpress Pseudo-static entry into the backend 404 error solution for reference. However, not every webmaster friend uses the AMH control panel, so what should I do if a 404 error occurs? The following methods are for reference only and may not solve your problem. After all, everyone's configuration plan may be different. In the nginx environment, a 404 error will appear in the WordPress blog background. In fact, this is mainly due to the lack of a / in the URL address. There are two ways to solve this problem:
The first method:
Add the following code at the beginning of the WordPress configuration file wp-config.php:

Note: This code should be added before the php tag.
The second method:
If you are using the environment installed by the LNMP one-click installation package, the website configuration file will include the static configuration file of wordpress

 include wordpress.conf;

At this time we only need to add the following code at the end of the wordpress.conf static configuration file:

rewrite /wp-admin$ $scheme://$host$uri/ permanent;

Just restart nginx.

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