CentOS7安装配置mysql5.5为utf-8编码

安装步骤

安装

1	yum -y install mariadb mariadb-server

启动

1	systemctl start mariadb

开机启动

1	systemctl enable mariadb

配置安全策略

$ mysql_secure_installation
首先设置密码，会提示先输入密码
Enter current password for root (enter for none):<–初次运行直接回车

设置密码
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

其他配置
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

登陆

1	mysql -uroot -p

配置MariaDB的字符集

文件/etc/my.cnf

$ vim /etc/my.cnf
在[mysqld]标签下添加

init_connect='SET collation_connection = utf8_unicode_ci' 
init_connect='SET NAMES utf8' 
character-set-server=utf8 
collation-server=utf8_unicode_ci 
skip-character-set-client-handshake

文件/etc/my.cnf.d/client.cnf

$ vim /etc/my.cnf.d/client.cnf
在[client]中添加

default-character-set=utf8

文件/etc/my.cnf.d/mysql-clients.cnf

$vim /etc/my.cnf.d/mysql-clients.cnf
在[mysql]中添加

default-character-set=utf8

全部配置完成，重启mariadb

1	systemctl restart mariadb

进入MariaDB查看字符集

mysql> 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_unicode_ci |
| collation_database  | utf8_unicode_ci |
| collation_server      | utf8_unicode_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)

添加用户、配置权限

创建用户

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

直接创建用户并授权的命令

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

授予外网登陆权限

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

授予权限并且可以授权

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

只授予部分权限

1 2	把其中all privileges或者all改为select,insert,update,delete,create,drop,index,alter,grant,references,reload,shutdown,process,file；多个用逗号分隔