和普通的修改密码不太一样
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '('123456') where user='root' and Host='localhost'' at line 1
(base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ sudo service mysql restart (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ mysql Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 7 Server version: 8.0.19 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> mysql> mysql> mysql> mysql> mysql> select mysql.user Host,User,plugin,authentication_string; ERROR 1109 (42S02): Unknown table 'mysql' in field list mysql> mysql> mysql> mysql> select Host,User,plugin,authentication_string from mysql.user; +-----------+------------------+-----------------------+------------------------------------------------------------------------+ | Host | User | plugin | authentication_string | +-----------+------------------+-----------------------+------------------------------------------------------------------------+ | localhost | mysql.infoschema | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | localhost | mysql.session | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | localhost | mysql.sys | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | localhost | root | caching_sha2_password | e10adc3949ba59abbe56e057f20f883e | +-----------+------------------+-----------------------+------------------------------------------------------------------------+ 4 rows in set (0.01 sec) mysql> mysql> mysql> mysql> mysql> mysql> update mysql.user Set authentication_string=caching_sha2_password('123456') where user = 'root'; ERROR 1046 (3D000): No database selected mysql> mysql> 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> mysql> mysql> update user Set authentication_string=caching_sha2_password('123456') where user = 'root'; ERROR 1305 (42000): FUNCTION mysql.caching_sha2_password does not exist mysql> mysql> mysql> mysql> update user Set authentication_string='' where user = 'root'; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''' where user = 'root'' at line 1 mysql> mysql> mysql> update user Set authentication_string='' where user = 'root'; Query OK, 1 row affected (0.09 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> mysql> mysql> mysql> mysql> mysql> mysql> quit; Bye (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf # Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License, version 2.0, # as published by the Free Software Foundation. # # This program is also distributed with certain software (including # but not limited to OpenSSL) that is licensed under separate terms, # as designated in a particular file or component or in included license # documentation. The authors of MySQL hereby grant you an additional # permission to link the program and your derivative works with the # separately licensed software that they have included with MySQL. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License, version 2.0, for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA # # The MySQL Server configuration file. # # For explanations see # http://dev.mysql.com/doc/mysql/en/server-system-variables.html [mysqld] pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock datadir = /var/lib/mysql log-error = /var/log/mysql/error.log skip-grant-tables (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ sudo service mysql restart (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 8 Server version: 8.0.19 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> mysql> mysql> 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> mysql> mysql> mysql> mysql> mysql> ALTER user 'root'@'localhost' identified with caching_sha2_password by '123456'; Query OK, 0 rows affected (0.08 sec) mysql> mysql> mysql> mysql> mysql> flush privileges; Query OK, 0 rows affected (0.04 sec) mysql> mysql> mysql> mysql> exit; Bye (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ sudo service mysql restart (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 8 Server version: 8.0.19 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> mysql> mysql> mysql> exit; Bye (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$ (base) gbt@gbt-Precision-7720:~$