查看默认密码
grep ‘temporary password’ /var/log/mysqld.log
或者
cat /var/log/mysqld.log | grep ‘temporary password’
[root@VM_0_11_centos ~]# grep 'temporary password' /var/log/mysqld.log 2020-05-07T16:57:52.623306Z 1 [Note] A temporary password is generated for root@localhost: Ukyool6&htfu
修改密码
初次修改密码时,需要注意的是密码中需要含有字母、数字、特殊字符 (要含有大小字母且长度不能小于8)
[root@VM_0_11_centos ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1721 Server version: 5.7.30 MySQL Community Server (GPL) Copyright (c) 2000, 2020, 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> show databases; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. mysql> alter user root@localhost identified by 'root!@#123'; ERROR 1819 (HY000): Your password does not satisfy the current policy requirements mysql> SHOW VARIABLES LIKE 'validate_password%'; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. mysql> alter user root@localhost identified by 'Root!@#123'; Query OK, 0 rows affected (0.00 sec) mysql> SHOW VARIABLES LIKE 'validate_password%'; +--------------------------------------+--------+ | Variable_name | Value | +--------------------------------------+--------+ | 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 | +--------------------------------------+--------+ 7 rows in set (0.01 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> select Host,User from user; +-----------+---------------+ | Host | User | +-----------+---------------+ | localhost | mysql.session | | localhost | mysql.sys | | localhost | root | +-----------+---------------+ 3 rows in set (0.00 sec) mysql>
关于 mysql 密码策略相关参数; 1)、validate_password_length 固定密码的总长度; 2)、validate_password_dictionary_file 指定密码验证的文件路径; 3)、validate_password_mixed_case_count 整个密码中至少要包含大/小写字母的总个数; 4)、validate_password_number_count 整个密码中至少要包含阿拉伯数字的个数; 5)、validate_password_policy 指定密码的强度验证等级,默认为 MEDIUM; 关于 validate_password_policy 的取值: 0/LOW:只验证长度; 1/MEDIUM:验证长度、数字、大小写、特殊字符; 2/STRONG:验证长度、数字、大小写、特殊字符、字典文件; 6)、validate_password_special_char_count 整个密码中至少要包含特殊字符的个数;
总结
以上就是
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