mysql重置密码

wulilideMacBook-Pro:bin wulili$ mysql start

ERROR 1045 (28000): Access denied for user 'wulili'@'localhost' (using password: NO)

wulilideMacBook-Pro:bin wulili$ su - root

1、吧mysql服务关闭

2、

启动mysqld_safe ，跳过启动授权表。启动时加上skip-grant-tables参数目的是在启动mysql时不启动grant-tables，授权表。这样就可以修改root的密码了。

# mysqld_safe --skip-grant-tables &

wulilideMacBook-Pro:support-files root# find / -name mysqld_safe

find: /dev/fd/3: Not a directory

find: /dev/fd/4: Not a directory

/usr/local/mysql-5.7.16-osx10.11-x86_64/bin/mysqld_safe

wulilideMacBook-Pro:support-files root# /usr/local/mysql-5.7.16-osx10.11-x86_64/bin/mysqld_safe --skip-grant-tables &

[1] 1397

wulilideMacBook-Pro:support-files root# 2016-11-30T11:47:40.6NZ mysqld_safe Logging to '/usr/local/mysql/data/wulilideMacBook-Pro.local.err'.

2016-11-30T11:47:40.6NZ mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data

mysql -uroot -p

Enter password: 按下回车键

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 2

Server version: 5.7.16 MySQL Community Server (GPL)

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.

mysql> update user set password=PASSWORD('12345678') where user="root";

ERROR 1046 (3D000): No database selected

mysql> use mysql;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> update user set password=PASSWORD('12345678') where user="root";

ERROR 1054 (42S22): Unknown column 'password' in 'field list'

mysql> update user set passwd=PASSWORD('12345678') where user="root";

ERROR 1054 (42S22): Unknown column 'passwd' in 'field list'

mysql> update user set password=password('12345678') where User='root';

ERROR 1054 (42S22): Unknown column 'password' in 'field list'

mysql> update user set authentication_string=password('12345678') where user="root";

Query OK, 1 row affected, 1 warning (0.01 sec)

Rows matched: 1 Changed: 1 Warnings: 1

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> quit

Bye

3、重启数据库

wulilideMacBook-Pro:support-files root# /usr/local/mysql/support-files/mysql.server restart

Shutting down MySQL

..2016-11-30T11:58:22.6NZ mysqld_safe mysqld from pid file /usr/local/mysql/data/wulilideMacBook-Pro.local.pid ended

SUCCESS!

Starting MySQL

. SUCCESS!

[1]+ Done /usr/local/mysql-5.7.16-osx10.11-x86_64/bin/mysqld_safe --skip-grant-tables

wulilideMacBook-Pro:support-files root# mysql -u root -p 这里密码就是12345678了

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 4

Server version: 5.7.16

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.

mysql> quit

Bye

wulilideMacBook-Pro:support-files root#

mysql> use mysql;

ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

mysql> alter user 'root'@'localhost' identified by '12345678';

Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema |

| mysql |

| performance_schema |

| sys |

+--------------------+

4 rows in set (0.00 sec)