忘记root密码

如果不小心忘记了root密码，那么mysql就不能再登录了，这时就要重置root密码才行。通过下面的步骤，我们可以重新设置root密码。

1、退出mysql

[root@localhost src]# service mysqld stop

停止mysqld：[确定]

[root@localhost src]#

2、进入sql安全模式，命令“/usr/bin/mysqld_safe --skip-grant-table &”

[root@localhost src]#/usr/bin/mysqld_safe --skip-grant-table &

[1] 6332

[root@localhost src]# 180814 10:10:00 mysqld_safe Logging to '/var/log/mysqld.log'.

180814 10:10:00 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

3、无密码方式登录，命令“mysql –u root”

[root@localhost src]# mysql -u root

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

Your MySQL connection id is 1

Server version: 5.1.71 Source distribution

Copyright (c) 2000, 2013, 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>

4、使用mysql，命令“use mysql；”

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>

5、重设root密码，命令“update user set password=password (“密码”) where user=’root’”

mysql> update user set password=password('123456') where user='root';

Query OK, 3 rows affected (0.00 sec)

Rows matched: 3  Changed: 3  Warnings: 0

mysql>

6、刷新

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

7、退出，重新登录

[root@localhost src]# mysql -u root -p

Enter password:        //这里输入新密码

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

Your MySQL connection id is 2

Sever version: 5.1.71 Source distribution

Copyright (c) 2000, 2013, 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>