1 [mariadb]
2 name = MariaDB
3 baseurl = https://mirrors.ustc.edu.cn/mariadb/yum/10.2/centos7-amd64
4 gpgkey=https://mirrors.ustc.edu.cn/mariadb/yum/RPM-GPG-KEY-MariaDB
5 gpgcheck=1

yum install MariaDB-server MariaDB-client

sudo sed -i 's#//mirrors.ustc.edu.cn#//ipv4.mirrors.ustc.edu.cn#g' /etc/yum.repos.d/mariadb.repo

systemctl start mariadb

service mariadb start

systemctl enable mariadb

chkconfig mariadb on

mysql_secure_installation

Enter current password for root (enter for none):<–初次运行直接回车

Set root password? [Y/n] <– 是否设置root用户密码，输入y并回车或直接回车
New password: <– 设置root用户的密码
Re-enter new password: <– 再输入一次你设置的密码

Remove anonymous users? [Y/n] <– 是否删除匿名用户，回车Disallow root login remotely? [Y/n] <–是否禁止root远程登录,回车,Remove test database and access to it? [Y/n] <– 是否删除test数据库，回车Reload privilege tables now? [Y/n] <– 是否重新加载权限表，回车

mysql -uroot -p [回车，之后输入密码]

vim /etc/my.cnf.d/mysql-clients.cnf
[mysql]
default-character-set=utf8

vim /etc/my.cnf.d/server.cnf
[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

slow_query_log = ON
slow_query_log_file = /usr/local/mysql/data/slow.log
long_query_time = 1

systemctl restart mariadb

mysql> show variables like "%character%";show variables like "%collation%";

ariaDB [(none)]> show variables like "%character%";show variables like "%collation%";
+--------------------------+----------------------------+
| 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/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)+----------------------+-----------------+
| Variable_name        | Value           |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database   | utf8_general_ci |
| collation_server     | utf8_general_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)

mysql>create user username@localhost identified by 'password';

mysql>grant all on *.* to username@localhost indentified by 'password';

mysql>grant all privileges on *.* to username@'%' identified by 'password';

mysql>grant all privileges on *.* to username@'hostname' identified by 'password' with grant option;