Centos系統mysql 忘記root用戶的密碼

第一步：(停掉正在運行的mysql)
[root@maomao ~]# service mysqld stop  
Stopping MySQL:                                            [  OK  ]

 

第二步：使用 「--skip-grant-tables」參數從新啓動mysql
[root@mcy400 ~]# mysqld_safe --skip-grant-tables 

[root@cy400 ~]# Starting mysqld daemon with databases from /var/lib/mysql

注意：若是停在這一步的時候，請新開SSH登錄接着下一步操做

 

第三步：用賬號登陸mysql
[root@cy400 ~]# mysql -u root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.0.77 Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

 

第四步：改變用戶數據庫
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

 

第五步：修改密碼，下面()內的root123爲新密碼
mysql> update user set password=password('root123') where user='root';

Query OK, 3 rows affected (0.00 sec)

Rows matched: 3  Changed: 3  Warnings: 0

 

第六步：刷新權限表
mysql> flush previleges;
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 'previleges' at line 1

 

第七步：退出mysql
mysql> quit
Bye

 

第八步：對mysql進行重啓
[root@cy400 ~]# service mysqld restart;

Stopping MySQL:                                            [  OK  ]
Starting MySQL:                                            [  OK  ]

 

第九步：用更改過的密碼從新登陸便可。
[root@cy400 ~]# mysql -u root -p
Enter password: admin123
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.0.77 Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> quit
Bye

[root@cy400 ~]#

 

加入以下自動啓動命令 /etc/rc.d/init.d/mysqld start