安全設定

1. 開始 mariadb 的安全設定。

   [root@kvm3 ~]# mariadb-secure-installation
   
   NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
         SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!
   
   In order to log into MariaDB to secure it, we'll need the current
   password for the root user. If you've just installed MariaDB, and
   haven't set the root password yet, you should just press enter here.
   
   Enter current password for root (enter for none):
   OK, successfully used password, moving on...
   
   Setting the root password or using the unix_socket ensures that nobody
   can log into the MariaDB root user without the proper authorisation.
   
   You already have your root account protected, so you can safely answer 'n'.
   
   Switch to unix_socket authentication [Y/n] n
    ... skipping.
   
   You already have your root account protected, so you can safely answer 'n'.
   
   Change the root password? [Y/n] y
   New password:
   Re-enter new password:
   Password updated successfully!
   Reloading privilege tables..
    ... Success!
   
   
   By default, a MariaDB installation has an anonymous user, allowing anyone
   to log into MariaDB 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] n
    ... skipping.
   
   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] n
    ... skipping.
   
   By default, MariaDB 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] n
    ... skipping.
   
   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 MariaDB
   installation should now be secure.
   
   Thanks for using MariaDB!
   

2. 使用剛剛設定的 root 密碼登入 mariadb。

   [root@kvm3 ~]# mariadb -uroot -pqweqwe
   Welcome to the MariaDB monitor.  Commands end with ; or \g.
   Your MariaDB connection id is 12
   Server version: 10.5.16-MariaDB MariaDB Server
   
   Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
   
   Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
   
   MariaDB [(none)]> quit
   Bye