[root@mariadb Downloads]# mysql_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

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 MariaDB

root user without the proper authorisation.

Set root password? [Y/n] y

New password:

Re-enter new password:

Sorry, passwords do not match.

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] 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, 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!

[root@mariadb Downloads]# mysql -uroot -p

Enter password:

Welcome to the MariaDB monitor.  Commands end with ; or \g.

Your MariaDB connection id is

Server version: 10.2.-MariaDB MariaDB Server

Copyright (c) , , Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> 

[root@mariadb ~]# vim /etc/my.cnf.d/mysql-clients.cnf 

#

# These groups are read by MariaDB command-line tools

# Use it for options that affect only one utility

#

[mysql]

default-character-set=utf8

[mysql_upgrade]

[mysqladmin]

[mysqlbinlog]

[mysqlcheck]

[mysqldump]

[mysqlimport]

[mysqlshow]

[mysqlslap]

~           

[root@mariadb ~]# vim /etc/my.cnf.d/server.cnf

#

# These groups are read by MariaDB server.

# Use it for options that only the server (but not clients) should see

#

# See the examples of server my.cnf files in /usr/share/mysql/

#

# this is read by the standalone daemon and embedded servers

[server]

# this is only for the mysqld standalone daemon

[mysqld]

init_connect='SET collation_connection = utf8_general_ci'

init_connect='SET NAMES utf8'

character-set-server=utf8

collation-server=utf8_general_ci

skip-character-set-client-handshake

default-storage-engine = innodb

innodb_file_per_table

max_connections = 

#开启慢查询

#slow_query_log = ON

#slow_query_log_file = /usr/local/mysql/data/slow.log

#long_query_time =

#

#

# * Galera-related settings

#

MariaDB [(none)]> show variables like 'char%';

+--------------------------+----------------------------+

| Variable_name            | Value                      |

+--------------------------+----------------------------+

| character_set_client     | utf8                       |

| character_set_connection | utf8                       |

| character_set_database   | utf8                       |

| character_set_filesystem | binary                     |

| character_set_results    | utf8                       |

| character_set_server     | utf8                       |

| character_set_system     | utf8                       |

| character_sets_dir       | /usr/share/mysql/charsets/ |

+--------------------------+----------------------------+

 rows in set (0.00 sec)

MariaDB [(none)]> show variables like 'colla%';

+----------------------+-----------------+

| Variable_name        | Value           |

+----------------------+-----------------+

| collation_connection | utf8_general_ci |

| collation_database   | utf8_general_ci |

| collation_server     | utf8_general_ci |

+----------------------+-----------------+

 rows in set (0.00 sec)

MariaDB [(none)]> 

MariaDB [mysql]> grant all privileges on *.* to user1@'%' identified by 'user188' with grant option;