在centos7以後的版本,通過yum源安裝的MySQL (5.7)後,首次登陸MySQL,需要先查看日誌文件,找到臨時密碼,登陸後,再修改密碼。或者,修改密碼策略,當然,你也選擇不修改密碼策略,我是做測試用,所以簡單密碼比較方便。具體操作如下:
更改密碼:
1、啓動MySQL
2、查看臨時密碼
grep 'temporary password' /var/log/mysqld.log
2017-05-06T05:58:54.621766Z 1 [Note] A temporary password is generated for root@localhost: +AqLt/ftS1)k
3、用臨時密碼登陸MySQL
mysql -u root -p +AqLt/ftS1
4、修改密碼
ALTER USER 'root'@'localhost' IDENTIFIED BY '123';
5、測試登陸
修改密碼策略:(先要修改臨時密碼,才能查看密碼策略,才能修改爲簡單密碼!!!)
1、查看當前密碼策略
show variables like '%password%';
| Variable_name | Value |
+---------------------------------------+--------+
| default_password_lifetime | 0 |
| disconnect_on_expired_password | ON |
| log_builtin_as_identified_by_password | OFF |
| mysql_native_password_proxy_users | OFF |
| old_passwords | 0 |
| report_password | |
| sha256_password_proxy_users | OFF |
| validate_password_check_user_name | OFF |
| validate_password_dictionary_file | |
| validate_password_length | 8 |
| validate_password_mixed_case_count | 1 |
| validate_password_number_count | 1 |
| validate_password_policy | MEDIUM |
| validate_password_special_char_count | 1 |
+---------------------------------------+--------+
2、修改策略(在配置文件中增加以下語句)
vi /etc/my.conf
validate_password = off
說明:off or 關閉; 0 or LOW; 1 or MEDIUM; 2 or STRONG
另,MySQL官網密碼策略詳細說明:http://dev.mysql.com/doc/refman/5.7/en/validate-password-options-variables.html#sysvar_validate_password_policy