忘记密码重置：
cd /etc
vi my.cnf
在[mysqld] 下新增一行
–skip-grant-tables
重启mysqld, systemctl restart mysqld
mysql -h localhost -uroot
mysql>use mysql;
mysql>select plugin from user where user=’root’;
mysql>update user set plugin=’mysql_native_password’;
mysql>update user set authentication_string=password(‘123456′) where user=’root’ and host=’localhost’;
mysql>flush privileges;
将my.cnf中新增的的行，删除
重启mysqld, systemctl restart mysqld
搞定！