設置mysql8.0.12-root的密碼

# /etc/init.d/mysqld stop
# mysqld_safe --skip-grant-tables &
# mysql
mysql> update mysql.user set authentication_string='' where user='root';
mysql> flush privileges;
mysql> alter user 'root'@'%' identified by '123';
mysql> quit
# service mysqld restart
# mysql -uroot -p'123'  用新的密碼登錄成功