!!!After all for change password and privileges:

mysql_secure_installation

Symptoms

• MySQL has been upgraded and now fails to start.
• The following error message appears in /var/log/mysqld.log when trying to start MySQL:

  [ERROR] Fatal error: mysql.user table is damaged. Please run mysql_upgrade.

• Plesk is not accessible with the following error message in a browser:

  ERROR: Zend_Db_Adapter_Exception: SQLSTATE[HY000] [2002] No such file or directory
  Additionally, an exception has occurred while trying to report this error: Zend_Exception
  No entry is registered for key 'translate' (Abstract.php:144)

Cause

MySQL 5.1 has been upgraded to 5.5 without running the «mysql_upgrade» command.

Resolution

1. Connect to the Plesk server via SSH.
2. Add the «skip-grant-tables» record to log in to MySQL:2.1. Open MySQL configuration file /etc/my.cnf in a text editor. In this example we use the vi editor:

   # vi /etc/my.cnf

   2.2. Add «skip-grant-tables» on a new line under the [mysqld] section:

   [mysqld]
   skip-grant-tables
   <…>

   2.3. Save the changes and close the file.

3. Start MySQL:

   # service mysqld start

   OR

   # service mysql start

4. Complete the MySQL upgrade:

   # mysql_upgrade

5. Remove the line with «skip-grant-tables» from the /etc/my.cnf file.
6. Restart MySQL:

   # service mysqld restart

   OR

   # service mysql start

For over ways https://ruhighload.com/mysql+1045+access+denied+for+user