一、mysql5.7 開始新版的mysql數據庫下的user表中已經沒有password字段了保持密碼的字段變成了authentication_string字段

如下：

mysql> update user set authentication_string=password('123456') where user='root';

Query OK, 4 rows affected, 1 warning (0.01 sec)

mysql> flush privileges;

修改完畢。重啟mysql

二、登錄mysql

修改完之后

mysql -uroot -p123456;登錄失敗

mysql -h127.0.0.1 -uroot -p123456;登錄成功

mysql -hlocalhost -uroot -p123456;登錄失敗

如果不覺得麻煩，你可以針對host=localhost 的賬號在修改一次密碼

1、[root@localhost /]# mysql -uroot -p123456;

mysql: [Warning] Using a password on the command line interface can be insecure.

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

發現失敗

2、[root@localhost /]# mysql -h127.0.0.1 -uroot -p123456;

mysql: [Warning] Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. ?Commands end with ; or \g.

Your MySQL connection id is 10

Server version: 5.7.22 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, 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>

登錄成功

.....

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