mysql系列：创建数据库和用户及赋权

创建数据库和用户及赋权

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

# 创建数据库,8.0以后mysql的utf8字符集分为utf8mb3和utf8mb4
mysql> create database develop default character set utf8mb4;
Query OK, 1 row affected, 1 warning (0.03 sec)

# 查询用户
mysql> select user,host from user;
+------------------+-----------+
| user             | host      |
+------------------+-----------+
| mysql.infoschema | localhost |
| mysql.session    | localhost |
| mysql.sys        | localhost |
| root             | localhost |
+------------------+-----------+
4 rows in set (0.00 sec)

# 使用数据库
mysql> use develop
Database changed

# 8.0以后如果要让nevicat连接成功，需要这样修改密码
mysql> alter user 'root'@'%' identified with mysql_native_password by '123456';
Query OK, 0 rows affected (0.33 sec)

# 给root账户赋权所有数据库，任何IP都可以登录的权限
mysql> grant all privileges on *.* to 'root'@'%' with grant option;
Query OK, 0 rows affected (0.00 sec)

# 创建用户
mysql> create user 'dev'@'%' identified by '123456';
Query OK, 0 rows affected (0.01 sec)

# 8.0以后如果要让nevicat连接成功，需要这样修改密码
mysql> alter user 'dev'@'%' identified with mysql_native_password by '123456';
Query OK, 0 rows affected (0.37 sec)

# 8.0版本以前的修改方式
mysql> alter user 'dev'@'%' identified by '123456';
Query OK, 0 rows affected (0.01 sec)

# 指定develop数据库给用户赋权
mysql> grant all privileges on develop.* to 'dev'@'%' with grant option;
Query OK, 0 rows affected (0.00 sec)



# 检查用户权限

mysql> show grants for dev;
+--------------------------------------------------------------------+
| Grants for dev@%                                                   |
+--------------------------------------------------------------------+
| GRANT USAGE ON *.* TO `dev`@`%`                                    |
| GRANT ALL PRIVILEGES ON `develop`.* TO `dev`@`%` WITH GRANT OPTION |
+--------------------------------------------------------------------+
2 rows in set (0.00 sec)

# 刷新权限
mysql> flush privileges;
Query OK, 0 rows affected (0.32 sec)

# 查询用户密码
mysql> select host,user,authentication_string from mysql.user;
+-----------+------------------+------------------------------------------------------------------------+
| host      | user             | authentication_string                                                  |
+-----------+------------------+------------------------------------------------------------------------+
| %         | dev              | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9                              |
| %         | root             | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9                              |
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session    | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys        | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
+-----------+------------------+------------------------------------------------------------------------+

MySQL 8.0 配置mysql_native_password身份验证插件的密码

方法一：

# 登录MySQL后输入：

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'YourPassword';

FLUSH PRIVILEGES;

方法二：

# 编辑my.cnf文件，更改默认的身份认证插件。

vi /etc/my.cnf

# 在[mysqld]中添加下边的代码
default_authentication_plugin=mysql_native_password

# 然后重启MySQL
service mysqld restart