Centos下忘記mysql的root密碼的解決方案

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一：(停掉正在啟動並執行mysql)
[[email protected] ~]# service mysql stop 
二：使用 “--skip-grant-tables”參數重新啟動mysql
[[email protected] ~]# mysqld_safe --skip-grant-tables &

[1] 23810
Starting mysqld daemon with databases from /var/lib/mysql 
三：用root帳號登入mysql
[[email protected] ~]# 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：改變使用者資料庫
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：重新整理許可權表
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec) 
七：退出mysql
mysql> quit
Bye 
八：對mysql進行重啟
[[email protected] ~]# 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：用更改過的密碼重新登入即可。
[[email protected] ~]# 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

十、重新執行修改密碼

SET PASSWORD = PASSWORD(‘123456‘);

註：第十步不一定需要，但是 MySql5.6操作時可能會報錯：You must SET PASSWORD before executing this statement.