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                ## 啟動修改丟失的MySQL單實例root的密碼方式 首先停止MySQL進程 ``` [root@localhost ~]# /etc/init.d/mysqld stop Shutting down MySQL. [確定] ``` 使用`--skip-grant-tables`參數啟動MySQL,忽略授權登陸驗證,如下 ``` [root@localhost ~]# /usr/local/mysql/bin/mysqld_safe --skip-grant-tables --user=mysql & [root@localhost ~]# mysql #這里直接使用mysql登錄,然后再使用上面的方法修改用戶密碼 [root@localhost ~]# /usr/local/mysql/bin/mysqladmin shutdown -uroot -p # 使用mysqladmin關閉mysqld進程 Enter password: [root@localhost ~]# service mysqld start # 再次重新登錄 ``` ## 多實例MySQL啟動修改用戶root丟失密碼的方法 * 關閉MySQL ``` killall mysqld 或者 /user/local/mysql/bin/mysqladmin -uroot -p shutdown -S /usr/local/mysql/data/3306/mysql.sock ``` * 啟動時加額外的配置文件my.cnf和 --skip-grant-tables參數 ``` /usr/local/mysql/bin/mysqld_safe --defaults-file=/usr/local/mysql/data/3306/my.cnf --skip-grant-table & ``` * 登錄并修改密碼 ``` mysql -S /usr/local/mysql/data/3306/mysql.sock # 無密碼登錄MySQL mysql> update mysql.user set password=password('aaaaaa') where user='root' and host="localhost"; mysql> flush privileges; ``` * 關閉進程并重新開啟進程進行測試修改結果 ``` [root@localhost ~]# mysqladmin shutdown -S /usr/local/mysql/data/3306/mysql.sock -uroot -p [root@localhost ~]# /usr/local/mysql/data/3306/mysqld start Starting MySQL... mysql -S /data/3306/mysql.sock -uroot -p ```
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