install mariadb on Centos 7

1. 检查是否已安装 mariadb

yum list installed | grep mariadb

2、安装MariaDB

如果未安装，执行以下命令安装命令

yum -y install mariadb mariadb-server

安装完成MariaDB，首先启动MariaDB

systemctl start mariadb

设置开机启动

systemctl enable mariadb

2. 修改配置

修改配置授权远程访问

vi /etc/my.cnf

bind-address = <some ip-address> | #bind-address = <some ip-address> 

创建远程访问用户，并授予访问权限

mysql
CREATE USER 'user1'@'internet_ip' IDENTIFIED BY 'the_password';
GRANT ALL ON *.* TO 'user1'@'internet_ip';

//or reset password if user exists
SET PASSWORD FOR 'user1'@'localhost' = PASSWORD('the_password');

3. 设置中文字符集

vi /etc/my.cnf
在[mysqld]标签下添加
#character
init_connect='SET collation_connection = utf8mb4_unicode_ci'
init_connect='SET NAMES utf8mb4'
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci
skip-character-set-client-handshake

vi /etc/my.cnf.d/client.cnf
在[client]下添加
#character
default-character-set=utf8mb4

vi /etc/my.cnf.d/mysql-clients.cnf

在[mysql]中添加

#character

default-character-set=utf8mb4

重启mariadb服务，使配置生效

systemctl restart mariadb

查看版本

MariaDB [(none)]> s
--------------
mysql  Ver 15.1 Distrib 5.5.68-MariaDB, for Linux (x86_64) using readline 5.1

Connection id:          3
Current database:
Current user:           root@localhost
SSL:                    Not in use
Current pager:          stdout
Using outfile:          ''
Using delimiter:        ;
Server:                 MariaDB
Server version:         5.5.68-MariaDB MariaDB Server
Protocol version:       10
Connection:             Localhost via UNIX socket
Server characterset:    utf8mb4
Db     characterset:    utf8mb4
Client characterset:    utf8mb4
Conn.  characterset:    utf8mb4
UNIX socket:            /var/lib/mysql/mysql.sock
Uptime:                 1 day 20 hours 48 min 13 sec

查看字符集是否生效

mysql> show variables like 'character%';  

MariaDB [(none)]> show variables like 'character%';
+--------------------------+----------------------------+
| Variable_name        | Value                         |
+--------------------------+----------------------------+
| character_set_client | utf8mb4 |
| character_set_connection | utf8mb4 |
| character_set_database | utf8mb4 |
| character_set_filesystem | binary |
| character_set_results | utf8mb4 |
| character_set_server | utf8mb4 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+

log for trouble shooting
/var/log/mariadb/mariadb.log 

4. 设置数据库对大小写不敏感

进入 /etc/my.cnf.d  ，编辑server.cnf
vi /etc/my.cnf.d/server.cnf

在[mysqld]下添加
lower_case_table_names = 1

 reference documents:

https://www.cnblogs.com/zhanzhan/p/7729981.html

https://blog.csdn.net/qq_35440040/article/details/86084909