( Changing MySQL user

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 A.3.2 How to Run MySQL as a Normal User
 On Windows, you can run the server as a Windows service using normal
 user accounts beginning with MySQL 4.0.17 and 4.1.2.  (Older MySQL
 versions required you to have administrator rights.  This was a bug
 introduced in MySQL 3.23.54.)
 On Unix, the MySQL server `mysqld' can be started and run by any user.
 However, you should avoid running the server as the Unix `root' user
 for security reasons.  In order to change `mysqld' to run as a normal
 unprivileged Unix user USER_NAME, you must do the following:
   1. Stop the server if it's running (use `mysqladmin shutdown').
   2. Change the database directories and files so that USER_NAME has
      privileges to read and write files in them (you might need to do
      this as the Unix `root' user):
           shell> chown -R USER_NAME /PATH/TO/MYSQL/DATADIR
      If you do not do this, the server will not be able to access
      databases or tables when it runs as USER_NAME.
      If directories or files within the MySQL data directory are
      symbolic links, you'll also need to follow those links and change
      the directories and files they point to.  `chown -R' might not
      follow symbolic links for you.
   3. Start the server as user USER_NAME. If you are using MySQL 3.22 or
      later, another alternative is to start `mysqld' as the Unix `root'
      user and use the `--user=USER_NAME' option.  `mysqld' will start
      up, then switch to run as the Unix user USER_NAME before accepting
      any connections.
   4. To start the server as the given user automatically at system
      startup time, specify the username by adding a `user' option to
      the `[mysqld]' group of the `/etc/my.cnf' option file or the
      `my.cnf' option file in the server's data directory. For example:
 If your Unix machine itself isn't secured, you should assign passwords
 to the MySQL `root' accounts in the grant tables.  Otherwise, any user
 with a login account on that machine can run the `mysql' client with a
 `--user=root' option and perform any operation.  (It is a good idea to
 assign passwords to MySQL accounts in any case, but especially so when
 other login accounts exist on the server host.)  
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