创建密码：

mysqladmin -u root -p password 123

或

MariaDB [(none)]> use mysqlMariaDB [mysql]> update user set password=password("123456")where user='root';Query OK, 0 rows affected (0.00 sec)Rows matched: 4 Changed: 0 Warnings: 0MariaDB [mysql]> flush privileges;Query OK, 0 rows affected (0.00 sec)

开启远程服务：

   查看user表：可以发现表中没有开启远程的服务 %   |  root

mysql> use mysql;Database changedmysql> select host,user,password from user;+--------------+------+-------------------------------------------+| host         | user | password                                  |+--------------+------+-------------------------------------------+| localhost    | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E || 127.0.0.1    | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |+--------------+------+-------------------------------------------+2 rows in set (0.00 sec)

实现远程连接(授权法)：

将host字段的值改为%就表示在任何客户端机器上能以root用户登录到mysql服务器，建议在开发时设为%。   

update user set host = ’%’ where user = ’root’;        将权限改为ALL PRIVILEGES

 

MariaDB [(none)]> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'IDENTIFIED BY '12345' WITH GRANT OPTION;Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> flush privileges; Query OK, 0 rows affected (0.00 sec)mysql> select host,user,password from user; +-----------+------+-------------------------------------------+ | host      | user | password                                  | +-----------+------+-------------------------------------------+ | localhost | root | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 | | 127.0.0.1 | root | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 | | ::1       | root | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 | | localhost |      |                                           | | %         | root | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 | +-----------+------+-------------------------------------------+ 5 rows in set (0.00 sec)

这样机器就可以以用户名root密码远程访问该机器上的MySql.

 

创建数据库(在root权限下)

create database mydb;

//授权admin用户拥有mydb数据库的所有权限。

>grant all privileges on mydb.* to admin@localhost identified by 'admin';

//刷新系统权限表

mysql>flush privileges;

删除用户。

@>mysql -u root -p

@>密码

mysql>DELETE FROM user WHERE User="admin" and Host="localhost";

mysql>flush privileges;

//删除用户的数据库

mysql>drop database mydb;

修改指定用户密码。

@>mysql -u root -p

@>密码

mysql>update mysql.user set password=password('新密码') where User="admin" and Host="localhost";

mysql>flush privileges;