修改mysql登录密码

遇到了烂尾机器的时候，能登录linux却不能登录mysql: mysql -u root ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) mysql -u root -p error: 'Access denied for user 'root'@'localhost' (using password: YES)' 此

遇到了烂尾机器的时候，能登录linux却不能登录mysql:

mysql -u root
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

mysql -u root -p

error: 'Access denied for user 'root'@'localhost' (using password: YES)'

此时，如果 MySQL 正在运行，首先杀之： killall -TERM mysqld

然后直接启动/usr/bin/mysqld_safe --skip-grant-tables &

此时就可以直接输入mysql登录了，

$ mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.14 MySQL Community Server (GPL)


Copyright (c) 2000, 2013, 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> 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("root") where user="root";
Query OK, 4 rows affected (0.68 sec)
Rows matched: 4 Changed: 4 Warnings: 0


mysql> flush privileges
-> ;
Query OK, 0 rows affected (0.00 sec)


mysql>

再次执行killall -TERM mysqld

然后启动 service mysql start

之后 mysql -uroot -p 使用 root就能登录了。

登录之后又报了个错误：

mysql> use mysql
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement

，执行SET PASSWORD = PASSWORD('root');后，正常

mysql> SET PASSWORD = PASSWORD('root');
Query OK, 0 rows affected (0.19 sec)


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>