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（1）登录到数据库所在服务器，手工kill掉MySQL进程：
kill ‘ cat /mysql-data-directory/hostname.pid‘
[root@iZ28dr6w0qvZ mysql]# ./bin/mysqld_safe --skip-grant-tables --user=root & [1] 17299 [root@iZ28dr6w0qvZ mysql]# 151006 13:14:41 mysqld_safe Logging to ‘/alidata/log/mysql/error.log‘. 151006 13:14:41 mysqld_safe Starting mysqld daemon with databases from /alidata/server/mysql/data
[root@iZ28dr6w0qvZ ~]# mysql -uroot Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 4 Server version: 5.5.37-log MySQL Community Server (GPL) Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql> set password = password(‘ysj123‘); ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement mysql> update mysql.user set password=password(‘123456‘) where user=‘root‘ and host=‘localhost‘; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0
mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
[root@iZ28dr6w0qvZ ~]# mysql -uroot ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO) [root@iZ28dr6w0qvZ ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 8 Server version: 5.5.37-log MySQL Community Server (GPL) Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
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原文地址：http://www.cnblogs.com/chenqionghe/p/4863274.html
