Centos系統mysql 忘記root用戶的密碼：

第一步：(停掉正在運行的mysql)

[root@CentOs5 ~]# service mysqld stop

Stopping MySQL: [ OK ]

第二步：使用 “–skip-grant-tables”參數重新啟動mysql

[root@CentOs5 ~]# mysqld_safe –skip-grant-tables &

[1] 23810

[root@CentOs5 ~]# Starting mysqld daemon with databases from /var/lib/mysql

第三步：用帳號登錄mysql

[root@CentOs5 ~]# 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，記得密碼要用password()函數進行加密，一定不要忘記！！！

mysql> update user set password=password(‘admin123′) where user=’root’;

Query OK, 1 row affected (0.04 sec)

Rows matched: 1 Changed: 1 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

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

第七步：退出mysql

mysql> quit

Bye

第八步：對mysql進行重啟

[root@CentOs5 ~]# service mysqld restart;

STOPPING server from pid file /var/run/mysqld/mysqld.pid

100421 13:44:03 mysqld ended

Stopping MySQL: [ OK ]

Starting MySQL: [ OK ]

[1]+ Done mysqld_safe –skip-grant-tables

第九步：用更改過的密碼重新登錄即可。

[root@CentOs5 ~]# 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@CentOs5 ~]#

總結

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