MySQL忘记root密码的解决办法

# 1.停掉MySQL进程
[root@standby ~]# /etc/init.d/mysqld stop
Shutting down MySQL... SUCCESS! 
[root@standby ~]#

# 2.mysqld_safe配置跳过授权表启动MySQL
[root@standby ~]# mysqld_safe --skip-grant-tables --user=mysql &
[1] 1670
[root@standby ~]# 170311 15:00:16 mysqld_safe Logging to '/application/mysql-5.1.72/data/standby.err'.
170311 15:00:16 mysqld_safe Starting mysqld daemon with databases from /application/mysql-5.1.72/data

[root@standby ~]#


# 3.进入MySQL
[root@standby ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.1.72 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.更改root密码
mysql> use mysql;
Database changed
mysql> 
mysql> update user set password=password('123456') where user='root' and host='localhost';
Query OK, 1 row affected (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> 
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> select user,host,password from mysql.user;
+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| wiki | localhost | *A5DB2D927D6DF94DA5E1CE4B293AEAAB4D8304EA |
| root | 127.0.0.1 |                                           |
+------+-----------+-------------------------------------------+
3 rows in set (0.00 sec)

mysql> delete from user where user='root' and host='127.0.0.1';
Query OK, 1 row affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> select user,host,password from mysql.user;
+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| wiki | localhost | *A5DB2D927D6DF94DA5E1CE4B293AEAAB4D8304EA |
+------+-----------+-------------------------------------------+
2 rows in set (0.00 sec)

mysql>

# 5.停止mysqld_safe方式开启的MySQL进程
[root@standby ~]# mysqladmin -uroot -p123456 shutdown
170311 15:11:08 mysqld_safe mysqld from pid file /application/mysql-5.1.72/data/standby.pid ended
[1]+  Done                    mysqld_safe --skip-grant-tables --user=mysql
[root@standby ~]# 
[root@standby ~]# 
[root@standby ~]# lsof -i:3306
[root@standby ~]# ps -ef |grep mysql
root       1967   1330  0 15:11 pts/1    00:00:00 grep --color=auto mysql

# 6.正常开启MySQL
[root@standby ~]# /etc/init.d/mysqld start
Starting MySQL. SUCCESS! 
[root@standby ~]#