MySQL5.7初始密碼查看及重設：

1.查看初始化密碼：

      [root@lone-centos67 ~]#  grep 'temporary password' /var/log/mysqld.log

      2016-10-13T06:30:03.521325Z 1 [Note] A temporary password is generated for root@localhost: E<apj1+mshge

      <apj1+mshge

     初始化密碼為：E<apj1+mshge

     密碼是隨機產生的

</apj1+mshge

2.登錄及修改密碼

[root@lone-centos67 ~]# mysql -p

Enter password:

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

Your MySQL connection id is 9

Server version: 5.7.15 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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>

mysql> show databases;

修改密碼

mysql> alter user root@localhost identified by 'xxx';

新密碼要求，必須包含大小寫字母數字及符號。

關閉密碼復雜度驗證：

在my.cnf添加validate_password=off

</apj1+mshge

</apj1+mshge