WordPress cannot use automatic update, prompting you to fill in the FTP information solution.

According to the one-click lnmp installation package, when WordPress prompts upgrading, click "Automatic Upgrade" to display the page for entering FTP information. For example, many of our lnmp users do not install FTP servers. In fact, this problem occurs because the nginx execution identity is not the file owner identity.

Solution:

Suppose your WordPress installation directory is/home/wwwroot/lnmp.org

Use Putty to log on to Linux VPs and run chown-r www/home/wwwroot/lnmp.org.

Run the preceding command to change the owner of all files under/home/wwwroot/lnmp.org to www, so that FTP is required for automatic update.

 

Http://blog.licess.org/wordpress-upgrade-error-ftp/