ubuntu mysql Access denied for user root@localhost

解決辦法：

1. vim mysqld.cnf  路徑：/etc/mysql/mysql.conf.d

在[mysqld]下新增skip-grant-tables

2. 重啟mysql服務

service mysql restart

3.連線mysql並設定密碼

   mysql -u root

mysql>flush privileges

mysql> GRANT ALL PRIVILEGES ON *.* TO root@localhost IDENTIFIED BY "123456";

參考部落格：https://blog.csdn.net/lisongjia123/article/details/57418989