Centos下忘記mysql的root密碼的解決方法

一：(停掉正在運行的mysql)
[root@NetDakVPS ~]# service mysql stop 
二：使用 「--skip-grant-tables」參數從新啓動mysql
[root@NetDakVPS ~]# mysqld_safe --skip-grant-tables &

[1] 23810
Starting mysqld daemon with databases from /var/lib/mysql 
三：用root賬號登陸mysql
[root@NetDakVPS ~]# 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 distributionType 'help;' or '\h' for help. Type '\c' to clear the buffer. 
四：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 -ADatabase changed 
五：修改密碼，記得密碼要用password()函數進行加密
mysql> update user set password=password('netdak') where user='root';
Query OK, 1 row affected (0.04 sec)
Rows matched: 1 Changed: 1 Warnings: 0 
六：刷新權限表
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec) 
七：退出mysql
mysql> quit
Bye 
八：對mysql進行重啓
[root@NetDakVPS ~]# service mysql restart;
STOPPING server from pid file /var/run/mysqld/mysqld.pid
100421 13:44:03 mysqld endedStopping MySQL: [ OK ]
Starting MySQL: [ OK ]
[1]+ Done mysqld_safe --skip-grant-tables 
九：用更改過的密碼從新登陸便可。
[root@NetDakVPS ~]# mysql -u root -p
Enter password: netdak
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.0.77 Source distributionType 'help;' or '\h' for help. Type '\c' to clear the buffer.mysql> quit
Bye

10、從新執行修改密碼

SET PASSWORD = PASSWORD('123456');

注：第十步不必定須要，可是 MySql5.6操做時可能會報錯：You must SET PASSWORD before executing this statement.