Updates commands in the 'securing the installation' section. Closes l…

…inode#6830

docs/guides/databases/mariadb/how-to-install-mariadb-on-debian-10/index.md

@@ -116,13 +116,13 @@ MariaDB [(none)]>
 plugin to enable root password authentication:
 
         USE mysql;
-        UPDATE user SET plugin='mysql_native_password' WHERE user='root';
+        ALTER USER root@localhost IDENTIFIED VIA mysql_native_password USING PASSWORD('password');
         FLUSH PRIVILEGES;
         exit;
 
-1.  Run the `mysql_secure_installation` script to address several security concerns in a default MariaDB installation:
+1.  Run the `mariadb-secure-installation` script to address several security concerns in a default MariaDB installation:
 
-        sudo mysql_secure_installation
+        sudo mariadb-secure-installation
 
 You will be given the choice to change the MariaDB root password, remove anonymous user accounts, disable root logins outside of localhost, and remove test databases. It is recommended that you answer `yes` to these options. You can read more about the script in the [MariaDB Knowledge Base](https://mariadb.com/kb/en/mariadb/mysql_secure_installation/).
 
@@ -239,4 +239,4 @@ If you forget your root MariaDB password, it can be reset.
 
 1.  You should now be able to log into the database with your new root password:
 
-        sudo mariadb -u root -p
+        sudo mariadb -u root -p