安装了插件wp-DBManager之后，要备份数据库，却提示：“MYSQL dump path does NOT exist”，查看了一下路径，是正确的。找了一下资料，资料显示：

Just ignore the error and try to backup, it should work if your path is correct and you have the permission to execute the file. It is not really possible to 100% determine the path of mysql and mysql dump.

原来，要这个插件运作，除了路径正确之外，还必须有相应的执行权限。给mysql加上相应的权限之后，问题解决。

参考链接：http://wordpress.org/support/topic/paths-to-mysqldump-and-mysql