Linux下MySQL忘記root密碼 1.1,mysqlroot

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Linux下MySQL忘記root密碼 1.1,mysqlroot
1.首先確認伺服器出於安全的狀態,也就是沒有人能夠任意地串連MySQL資料庫。 
因為在重新設定MySQL的root密碼的期間,MySQL資料庫完全出於沒有密碼保護的 
狀態下,其他的使用者也可以任意地登入和修改MySQL的資訊。可以採用將MySQL對 
外的連接埠封閉,並且停止Apache以及所有的使用者進程的方法實現伺服器的准安全 
狀態。最安全的狀態是到伺服器的Console上面操作,並且拔掉網線。 
2.修改MySQL的登入設定: (這裡修改的是/etc/my.cnf檔案,如果你安裝的mysql版本不同,設定檔的位置也不同,比如我的就是/usr/local/mysql/my.cnf,如果你在windows下,可能是my.ini,但裡面的內容結構都是一樣的)
# 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 
儲存並且退出vi。 
3.重新啟動mysqld 
# /etc/init.d/mysqld restart 
Stopping MySQL: [ OK ] 
Starting MySQL: [ OK ] 
4.登入並修改MySQL的root密碼 
# /usr/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 mysql.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 
5.將MySQL的登入設定修改回來 
# vi /etc/my.cnf 
將剛才在[mysqld]的段中加上的skip-grant-tables刪除 
儲存並且退出vi。 
6.重新啟動mysqld 
# /etc/init.d/mysqld restart 
Stopping MySQL: [ OK ] 
Starting MySQL: [ OK ]


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參考:http://www.cnblogs.com/allenblogs/archive/2010/08/12/1798247.html

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