达州做网站
大橙子网站建设，新征程启航
为企业提供网站建设、域名注册、服务器等服务
管理MySQL用户的详细步骤
本文主要给大家简单讲讲管理MySQL用户的详细步骤，相关专业术语大家可以上网查查或者找一些相关书籍补充一下，这里就不涉猎了，我们就直奔主题吧，希望管理MySQL用户的详细步骤这篇文章可以给大家带来一些实际帮助。
创新互联建站主要从事做网站、成都网站制作、网页设计、企业做网站、公司建网站等业务。立足成都服务平南,10年网站建设经验,价格优惠、服务专业,欢迎来电咨询建站服务:18980820575
1# 创建用户的一些限制和注意点
用户名长度必须不超过16个字符
用户名是大小写敏感的
2# 创建用户
语法：
(root@localhost)[(none)]> help create user
Name: 'CREATE USER'
Description:
Syntax:
CREATE USER user_specification [, user_specification] ...
user_specification:
user [ identified_option ]
auth_option: {
IDENTIFIED BY 'auth_string'
| IDENTIFIED BY PASSWORD 'hash_string'
| IDENTIFIED WITH auth_plugin
| IDENTIFIED WITH auth_plugin AS 'hash_string'
}
The CREATE USER statement creates new MySQL accounts. An error occurs
if you try to create an account that already exists.按照语法，最简答的创建用户的方法：
c(root@localhost)[mysql]> create user test1;
Query OK, 0 rows affected (0.00 sec)
(root@localhost)[mysql]> select user,host,password from user;
+-------+-----------+-------------------------------------------+
| user | host | password |
+-------+-----------+-------------------------------------------+
| root | localhost | *A0F874BC7F54EE086FCE60A37CE7887D8B31086B |
| test1 | % | |
+-------+-----------+-------------------------------------------+
2 rows in set (0.00 sec)
2 rows in set (0.00 sec)reate user test1;这个时候其实密码是空的，可以空密码登录的。
[mysql@mysql01 ~]$ mysql -S /data/mysqldata/3306/mysql.sock -utest1
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.31-log Source distribution
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
(test1@localhost)[(none)]> 但是没有任何权限：（USAGE这个权限，是代表废物的意思！嗯，就是这样）
(test1@localhost)[(none)]> show grants;
+-----------------------------------+
| Grants for test1@% |
+-----------------------------------+
| GRANT USAGE ON *.* TO 'test1'@'%' |
+-----------------------------------+
1 row in set (0.00 sec)3# 给用户设置密码：
命令
(root@localhost)[mysql]> help set password
Name: 'SET PASSWORD'
Description:
Syntax:
SET PASSWORD [FOR user] = password_option
password_option: {
PASSWORD('auth_string')
| OLD_PASSWORD('auth_string')
| 'hash_string'
}给test1设置一个密码：
(root@localhost)[mysql]> set password for test1=password('passwordtest');
Query OK, 0 rows affected (0.00 sec)
(root@localhost)[mysql]> select user,host,password from user where user='test1';
+-------+------+-------------------------------------------+
| user | host | password |
+-------+------+-------------------------------------------+
| test1 | % | *A76A397AE758994B641D5C456139B88F40610926 |
+-------+------+-------------------------------------------+
1 row in set (0.00 sec)至于OLD_PASSWORD()函数，是为了兼容老版本的密码而存在，古老的mysql4。
然而，set password for
(root@localhost)[mysql]> alter user test1 identified by 'password4test1';
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'identified by 'password4test1'' at line 1
(root@localhost)[mysql]> 以上可见报错了。原因是5.6还不支持这种密码修改方式：
(root@localhost)[mysql]> help alter user;
Name: 'ALTER USER'
Description:
Syntax:
ALTER USER user_specification [, user_specification] ...
user_specification:
user PASSWORD EXPIRE这里只有一个子句，就是设置密码过期
3# 账号的密码过期：
(root@localhost)[mysql]> alter user test1 password expire;
Query OK, 0 rows affected (0.00 sec)
(root@localhost)[mysql]> select user,host,password,password_expired from user;
+-------+-----------+-------------------------------------------+------------------+
| user | host | password | password_expired |
+-------+-----------+-------------------------------------------+------------------+
| root | localhost | *A0F874BC7F54EE086FCE60A37CE7887D8B31086B | N |
| test1 | % | *A76A397AE758994B641D5C456139B88F40610926 | Y |
+-------+-----------+-------------------------------------------+------------------+
2 rows in set (0.00 sec)可以看到账号密码已经过期。
但是过期以后还是可以登录，但是什么都干不了，会提示马上更改密码：
[mysql@mysql01 ~]$ mysql -S /data/mysqldata/3306/mysql.sock -utest1 -p'passwordtest'
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.6.31-log
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
(test1@localhost)[(none)]> select 1
-> ;
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement
(test1@localhost)[(none)]>
#修改当前账户的密码：
(test1@localhost)[(none)]> set password = password('password4test1');
Query OK, 0 rows affected (0.00 sec)
(test1@localhost)[(none)]>
#再次尝试登录，并做查询测试
[mysql@mysql01 ~]$ mysql -S /data/mysqldata/3306/mysql.sock -utest1 -p'password4test1'
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.31-log Source distribution
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
(test1@localhost)[(none)]> select 1;
+---+
| 1 |
+---+
| 1 |
+---+
1 row in set (0.00 sec)
#查询成功，说明密码更改成功。用管理账号查询use表查看账号状态：
(root@localhost)[mysql]> select user,host,password,password_expired from user;
+-------+-----------+-------------------------------------------+------------------+
| user | host | password | password_expired |
+-------+-----------+-------------------------------------------+------------------+
| root | localhost | *A0F874BC7F54EE086FCE60A37CE7887D8B31086B | N |
| test1 | % | *CFA887C680E792C2DCF622D56FB809E3F8BE63CC | N |
+-------+-----------+-------------------------------------------+------------------+
2 rows in set (0.00 sec)4# 远程登录
在user表中，test1的host列值为%，代表可以从任意位置登录mysql
[mysql@mysql01 ~]$ mysql -utest1 -p'password4test1' -h 192.168.199.101 -P 3306
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.6.31-log Source distribution
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
(test1@192.168.199.101)[(none)]> 5# 比较完整方式创建用户
(root@localhost)[mysql]> create user test2@'%' identified by 'password4test2';
Query OK, 0 rows affected (0.00 sec)
(root@localhost)[mysql]> create user test2@'192.168.199.101' identified by 'test2local';
Query OK, 0 rows affected (0.00 sec)
(root@localhost)[mysql]> select user,host,password from user where user='test2';
+-------+-----------------+-------------------------------------------+
| user | host | password |
+-------+-----------------+-------------------------------------------+
| test2 | 192.168.199.101 | *74F386E8F5EEC7648BABDD0FCBA4524B97344856 |
| test2 | % | *5AB2E18AD9EE76F76E1C02E4DBF97BC7C3B4588B |
+-------+-----------------+-------------------------------------------+
2 rows in set (0.00 sec)
(root@localhost)[mysql]> 建立了两个test2，这两个test2是不同的，实际上应该说，用户test2@'192.168.199.101' 和用户test2@'%' 是两个不同的用户。
[mysql@mysql01 ~]$ mysql -utest2 -p'test2local' -h 192.168.199.101 -P 3306
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 14
Server version: 5.6.31-log Source distribution
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
(test2@192.168.199.101)[(none)]>
[mysql@mysql01 ~]$ mysql -utest2 -S /data/mysqldata/3306/mysql.sock -p'password4test2'
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 21
Server version: 5.6.31-log Source distribution
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
(test2@localhost)[(none)]> 5# 修改密码：
1，set password 方式：
(root@localhost)[mysql]> set password for test1=password('password4test1');
Query OK, 0 rows affected (0.00 sec)2，直接update系统表user，这种方式需要刷新权限列表
(root@localhost)[mysql]> update user set password=password('password4test1') where user='test1';
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1 Changed: 0 Warnings: 0
(root@localhost)[mysql]> flush privileges;
Query OK, 0 rows affected (0.00 sec)3，grant 方式
(root@localhost)[mysql]> grant usage on *.* to test1 identified by 'password4test1';
Query OK, 0 rows affected (0.01 sec)
管理MySQL用户的详细步骤就先给大家讲到这里，对于其它相关问题大家想要了解的可以持续关注我们的行业资讯。我们的板块内容每天都会捕捉一些行业新闻及专业知识分享给大家的。
网站标题：管理MySQL用户的详细步骤
标题网址：http://dzwzjz.com/article/piiigd.html