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Secure a MySQL installation using mysql_secure_installation

A standard installation of MySQL includes a number of tools to manage the database server. One of these tools is the ‘mysql_secure_installation’ script. This script guides the user through setting up a secure MySQL root password, removes the anonymous user account, disabling remote root connections, removes the test database, and finally flushes all the changed made to make sure they are active.

To execute the script, simply run the following command:

$ mysql_secure_installation

In summary, these are the questions that you will be prompted for:

  • Change the root password? [Y/n]
  • Remove anonymous users? [Y/n]
  • Disallow root login remotely? [Y/n]
  • Remove test database and access to it? [Y/n]
  • Reload privilege tables now? [Y/n]

You should generally select ‘Y’ to all these options. You can select ‘N’ to the first one, if you already have a strong root password.

Example output:

$ mysql_secure_installation


In order to log into MySQL to secure it, we'll need the current
password for the root user.  If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none):
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.

You already have a root password set, so you can safely answer 'n'.

Change the root password? [Y/n] n
 ... skipping.

By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] y
 ... Success!

Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] y
 ... Success!

By default, MySQL comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] y
 - Dropping test database...
ERROR 1008 (HY000) at line 1: Can't drop database 'test'; database doesn't exist
 ... Failed!  Not critical, keep moving...
 - Removing privileges on test database...
 ... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] y
 ... Success!

Cleaning up...

All done!  If you've completed all of the above steps, your MySQL
installation should now be secure.

Thanks for using MySQL!


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