我从窗户里探头往外看，嘿！春天果然到来了。看，外面嫩绿的小草像动画片里的那样，慢慢探出头来。再看，那平坦的草地里，星星点点的眨着眼睛的是什么？哦！那是可爱的小花，还有小虫在花瓣里钻来钻去呢？嘻，原来是童话故事里睡在花瓣里的拇指姑娘啊！再看看，那干枯已久的柳树也伸出了嫩绿的手，轻轻地走来了美丽的春姑娘！
1在配置文件中添加skip-grant-tables后重启mysql，然后直接登录
[root@tyjs09 ~]# cat /etc/my.cnf [mysqld] user=mysql basedir=/application/mysql datadir=/data/mysql/data socket=/tmp/mysql.sock server_id=6 port=3306 gtid-mode=on enforce-gtid-consistency=true log_error=/data/mysql/data/mysql.log log_bin=/data/binlog/mysql-bin secure-file-priv=/tmp innodb_flush_method=O_DIRECT lower_case_table_names=1 skip-grant-tables
2更新密码
mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> alter user "root"@"localhost" identified by "123456"; ERROR 1396 (HY000): Operation ALTER USER failed for 'root'@'localhost' mysql> use mysql;select user,host from user;root | % | | mysql.infoschema | localhost | | mysql.session | localhost | | mysql.sys | localhost | +------------------+-----------+ 4 rows in set (0.00 sec) mysql> ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges;
3在配置文件中去掉免登录然后重启mysql：
[root@tyjs09 ~]# vim /etc/my.cnf [mysqld] user=mysql basedir=/application/mysql datadir=/data/mysql/data socket=/tmp/mysql.sock server_id=6 port=3306 gtid-mode=on enforce-gtid-consistency=true log_error=/data/mysql/data/mysql.log log_bin=/data/binlog/mysql-bin secure-file-priv=/tmp innodb_flush_method=O_DIRECT lower_case_table_names=1 skip-grant-tables #去掉
[root@tyjs09 ~]# service mysql restart Shutting down MySQL.. SUCCESS! Starting MySQL. SUCCESS! [root@tyjs09 ~]# mysql -uroot -p123456 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 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>
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