linux下mysql的root密码忘记解决

1．修改MySQL的登录设置： 

    
    
    
    

     
     
     
     
# vi /etc/my.cnf 
    
    
    
    

在[mysqld]的段中加上一句：skip-grant-tables 

例如： 

    
    
    
    

     
     
     
     
[mysqld] 
     
     
     
     
datadir=/var/lib/mysql 
     
     
     
     
socket=/var/lib/mysql/mysql.sock 
     
     
     
     
skip-grant-tables 
    
    
    
    

保存并且退出vi。 

2．重新启动mysqld 

    
    
    
    

     
     
     
     
# ./home/mariadb/bin/mysqld restart 
     
     
     
     
Stopping MySQL: [ OK ] 
     
     
     
     
Starting MySQL: [ OK ] 
    
    
    
    

3．登录并修改MySQL的root密码 

    
    
    
    

     
     
     
     
# ./home/mariadb/bin/mysql 
     
     
     
     
Welcome to the MySQL monitor. Commands end with ; or \g. 
     
     
     
     
Your MySQL connection id is 3 to server version: 3.23.56 
     
     
     
     
Type 'help;' or '\h' for help. Type '\c' to clear the buffer. 
     
     
     
     
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 
     
     
     
     
mysql> UPDATE user SET Password = password('new-password') WHERE User = 'root' ; 
     
     
     
     
Query OK, 0 rows affected (0.00 sec) 
     
     
     
     
Rows matched: 2 Changed: 0 Warnings: 0 
     
     
     
     
mysql> flush privileges ; 
     
     
     
     
Query OK, 0 rows affected (0.01 sec) 
     
     
     
     
mysql> quit 
     
     
     
     
Bye 
    
    
    
    

4．将MySQL的登录设置修改回来 

    
    
    
    

     
     
     
     
# vi /etc/my.cnf 
    
    
    
    

将刚才在[mysqld]的段中加上的skip-grant-tables删除 

保存并且退出vi。 

5．重新启动mysqld 

    
    
    
    

     
     
     
     
# ./home/mariadb/bin/mysqld restart 
     
     
     
     
Stopping MySQL: [ OK ] 
     
     
     
     
Starting MySQL: [ OK ]
    
    
    
    

来自为知笔记(Wiz)