建立数据库连接Amazon EC2时出错-移动我的wordpress博客后
将wordpress博客移至Amazon EC2后，出现错误：建立数据库连接时出错。我已经检查了wp-config.php文件，并且设置正常（本地主机，密码和用户名）。
I am getting the error: "error establishing a database connection" after moving my wordpress blog to Amazon EC2. I've checked the wp-config.php file and settings are ok (localhost, password and username).
我在这里阅读了很多问题和答案，但是没有任何帮助。
I've read many of the questions and answers here but nothing helped me.
我具有shell访问权限，因此我可以检查您需要我执行的所有操作。也许我应该查看phpmyadmin的配置文件，看看那里有什么数据库连接设置，因为phpmyadmin可以工作，但是我不知道它在哪里。
I have shell access so I can check everything that you need me to do. Maybe I should look at the configuration file for phpmyadmin to see what db connection settings are there, because phpmyadmin works, but I don't know where it is.
谢谢
对我来说，重新启动mysqld服务即可。但是，当我执行 sudo服务mysqld restart 时，MySql服务就停止了，但是没有启动。 sudo服务mysqld start 给出了 MySQL Deamon无法启动错误。我花了很多时间尝试启动该服务，但我想真正的罪魁祸首是httpd服务。我停止了httpd服务 sudo服务httpd stop 。现在执行 sudo服务mysqld restart ，然后将wordpress网站重新联机（记住要启动httpd服务）。这听起来有些la脚，但它确实有效，从我发现MySQL DB停止运行的原因有很多，查看日志并找出实际原因是唯一对我有用的东西。
For me just restarting the mysqld service worked. There was a hitch though, as soon as I executed sudo service mysqld restart the MySql service stopped but didn't start. sudo services mysqld start gave a MySQL Deamon Failed to Start Error. I spent a lot of time trying to start the service but I guess the real culprit was the httpd service. I stopped the httpd service sudo service httpd stop. Now execute sudo service mysqld restart and bingo the wordpress site was back online(remember to start the httpd service). This sounds kind of lame but it worked, from what I figured out the MySQL DB stops for a number of reasons looking at the log and figuring out the actual reason is the only thing that works for me.