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2025-04-06 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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After centos7, MySQL (5.7) installed through yum source, log in MySQL for the first time, you need to check the log file first, find the temporary password, and then modify the password after logging in. Or, modify the password policy, of course, you also choose not to modify the password policy, I am doing testing, so simple password is more convenient. The specific operation is as follows:
Change password:
Start MySQL
2. View temporary password
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. Log in to MySQL with a temporary password
mysql -u root -p +AqLt/ftS1
4. Change password
ALTER USER 'root'@'localhost' IDENTIFIED BY '123';
5. Test landing
Modify password policy: (Temporary password must be modified first before password policy can be viewed, before simple password can be modified!!!)
1. View current password policy
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. Modify the policy (add the following statement to the configuration file)
vi /etc/my.conf
validate_password = off
Description: off or OFF; 0 or LOW; 1 or MEDIUM; 2 or STRONG
MySQL official website password policy details: dev.mysql.com/doc/refman/5.7/en/validate-password-options-variables.html#sysvar_validate_password_policy
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