編譯安裝完mysql5.6，如果用於生產環境，最好執行mysql_secure_installation來做一些常規化安全設置。
需要提前將~mysql/bin加入環境變量
/apps/mysql//bin/mysql_secure_installation
------------->
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY! 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):
提示輸入密碼，沒有密碼就直接回車
OK, successfully used password, moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
Set root password? [Y/n]
提示設置root user密碼 Y
New password: Re-enter new password: Password updated successfully! Reloading privilege tables.. ... Success! 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]
生產環境建議刪除系統創建的匿名用戶 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]
禁止root用戶遠程登錄 Y
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]
刪除test數據庫 Y
- Dropping test database... ... Success! - 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]
重載權限表 Y
... Success! All done! If you've completed all of the above steps, your MySQL installation should now be secure. Thanks for using MySQL! Cleaning up...
完成~~~
完成后空密碼已經無法登錄
# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
mysql> select user,host from mysql.user;
+-------+-----------+
| user | host |
+-------+-----------+
| root | 127.0.0.1 |
| root | ::1 |
| root | localhost |
+-------+-----------+
4 rows in set (0.01 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)