mysql 5.7以后需要设置安全导向

// mysql_secure_installation安全配置向导

[root@youxi1 ~]# mysql_secure_installation
 
Securing the MySQL server deployment.
 
Enter password for user root: 　　//输入root密码
The 'validate_password' plugin is installed on the server.
The subsequent steps will run with the existing configuration
of the plugin.
Using existing password for root.
 
Estimated strength of the password: 25
Change the password for root ? ((Press y|Y for Yes, any other key for No) : No　　//是否更改root密码，如果输入y会要求设置新的密码
 
 ... 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? (Press y|Y for Yes, any other key for No) : y　　//是否删除匿名用户，建议y删除
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? (Press y|Y for Yes, any other key for No) : y　　//是否禁止root远程登录，建议y禁止
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? (Press y|Y for Yes, any other key for No) : y　　//是否删除test数据库，y删除
 - 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? (Press y|Y for Yes, any other key for No) : y　　//是否重新加载权限表，y重新加载
Success.
 
All done!