1.mysql密碼忘記

2.停止mysql

/etc/init.d/mysql stop

3.啟動無密登入mysql

前面/usr/local/mysql/bin/，是MySQL安裝的目錄bin下

/usr/local/mysql/bin/mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

4.進入mysql命令

/usr/local/mysql/bin/mysql -uroot -p

密碼：是空，直接按回車鍵

5.修改密碼

MySQL版本是5.7

use mysql;
update user set authentication_string=password('123456') where user='root';
flush privileges;
quit;
 

6.重啟mysql

/etc/init.d/mysql restart

如果以上幫不了你，可以參考下：
https://www.cnblogs.com/liulei-LL/p/7898804.html