mysql刪錯user表,忘記root密碼

   刪錯了user表root也連不上去了,而後咱們能夠理解爲root密碼不知道了,忘記了。使用此類方法來找回root,再對刪除後的user從新建立。還好不是線上的。。。



1.修改MySQL的登陸設置: 
# vim /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 
保存而且退出vi。

2.從新啓動mysqld 
# service mysqld restart 
Stopping MySQL: [ OK ] 
Starting MySQL: [ OK ]

3.登陸並修改MySQL的root密碼 
# 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 ; 
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

4.將MySQL的登陸設置修改回來 
# vim /etc/my.cnf 
將剛纔在[mysqld]的段中加上的skip-grant-tables刪除 
保存而且退出vim

5.從新啓動mysqld 
# service mysqld restart 
Stopping MySQL: [ OK ] 
Starting MySQL: [ OK ]

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