centos 7忘記mysql的密碼是解決辦法

方法

一、找回安裝是的初始密碼：

1、grep 'temporary password' /var/log/mysqld.log

方法二、使用作業系統賬號和密碼，進行修改密碼

1、mysql -uroot -p

2、輸入你的centos的密碼

3、update mysql.user set authentication_string = password('mynewpassword') where user = 'root' and host = 'localhost';

注：如果顯示 error 1819 (hy000): your password does not satisfy the current policy requirements，說明你的密碼不符合安全要求，

4、flush privileges;

5、quit;

方法三、強制進行修改密碼

1、systemctl stop mysqld

2、systemctl set-environment mysqld_opts="--skip-grant-tables"

3、systemctl start mysqld

4、mysql -u root

5、update mysql.user set authentication_string = password('mynewpassword') where user = 'root' and host = 'localhost';

注：如果顯示 error 1819 (hy000): your password does not satisfy the current policy requirements，說明你的密碼不符合安全要求，

6、flush privileges;

7、quit;