centos7通过yum安装mariadb5.5和字符编码修改

1. 安装mariadb

yum upgrade #更新yum
yum -y install mariadb mariadb-server #自动安装mariadb和mariadb-server
systemctl start mariadb

2. 基本选项配置

mysql_secure_installation
New password： #输入新的root账户密码
Re-enter new password: #确认密码
Remove anonymous users? [Y/n] # 是否移除匿名用户
Disallow root login remotely? [Y/n] #不允许root用户远程登录
Remove test database and access to it? [Y/n] # 移除test数据库
Reload privilege tables now? [Y/n] # 刷新权限
#当看到如下语句，则整个设置完成
All done!  If you've completed all of the above steps, your MariaDB
installation should now be secure.

Thanks for using MariaDB!

3. 字符编码修改

• 首先编辑mariadb数据库配置文件

vi /etc/my.cnf

在[mysqld]下添加

default-storage-engine = innodb
collation-server=utf8_general_ci
character-set-server = utf8

vi命令模式下保存退出

:x #wq也可以

• 编辑/etc/my.cnf.d/client.cnf文件

vi /etc/my.cnf.d/client.cnf

在[client]下添加：

default-character-set=utf8

保存并退出

• 编辑/etc/my.cnf.d/mysql-clients.cnf文件

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

在[mysql]下添加

default-character-set =utf8

保存并退出

• 重启服务

systemctl restart mariadb # 如果无法启动请检查数据库版本和字母拼写是否正确
systemctl enable mariadb # 设置开机自启

• 查看字符集

MariaDB [(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 (0.01 sec)