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[root@localhost ~]# cat /etc/my.cnf      注：在配置文件的【mysqld】下添加一行

[mysqld]skip-grant-tables

[root@localhost ~]# systemctl restart mysqld.service  #重启服务

[root@localhost ~]# mysql -u root -p Enter password:    注：回车 Welcome to the MySQL monitor.  Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.23-log Source distribution

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> use mysql；

mysql> show tables;     注：查看MySQL下的表，更新user即可

+---------------------------+ | Tables_in_mysql           | +---------------------------+ | columns_priv              | | db                        | | engine_cost               | | event                     | | func                      | | general_log               | | gtid_executed             | | help_category             | | help_keyword              | | help_relation             | | help_topic                | | innodb_index_stats        | | innodb_table_stats        | | ndb_binlog_index          | | plugin                    | | proc                      | | procs_priv                | | proxies_priv              | | server_cost               | | servers                   | | slave_master_info         | | slave_relay_log_info      | | slave_worker_info         | | slow_log                  | | tables_priv               | | time_zone                 | | time_zone_leap_second     | | time_zone_name            | | time_zone_transition      | | time_zone_transition_type || user                      | +---------------------------+  

mysql> update user set authentication_string=password('123.com') where user='root' and host='localhost';

Query OK, 1 row affected, 1 warning (0.00 sec) Rows matched: 1  Changed: 1  Warnings: 1

注：密码列不再是password，而是authentication_string

mysql> flush privileges;

Query OK, 0 rows affected (0.01 sec)

mysql> quit

注：将/etc/my.cnf下的skip-grant-tables删掉再次重启。

[root@localhost ~]# mysql -u root -p123.com   修改成功

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 3 Server version: 5.7.23-log Source distribution

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> 展现你的技术吧！

 

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