mysqladmin本地登陆报错ERROR 1045 (28000): Access denied for user 'root'@'localhost' 的解决方案如下：

mysqladmin -u root password xxxx


#1.停止mysql数据库
/etc/init.d/mysql stop
#2.执行如下命令
mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
#3.使用root登录mysql数据库
mysql -u root mysql
#4.更新root密码
mysql> UPDATE user SET Password=PASSWORD('mysql') where USER='root';
mysql>grant all on *.* to root@'%' identified by "mysql";
#5.刷新权限
mysql> FLUSH PRIVILEGES;
#6.退出mysql
mysql> quit
#7.重启mysql
/etc/init.d/mysql restart
#8.使用root用户重新登录mysql
mysql -uroot -p
Enter password: <输入新设的密码newpassword>






操作日志如下：
[root@mysqldb1 ~]# /etc/init.d/mysql stop
Shutting down MySQL..[ OK ]
[root@mysqldb1 ~]#
[root@mysqldb1 ~]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 7384
[root@mysqldb1 ~]# 160606 15:23:44 mysqld_safe Logging to '/var/lib/mysql/mysqldb1.err'.
160606 15:23:44 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql


[root@mysqldb1 ~]# mysql -u root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A


Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.31 MySQL Community Server (GPL)


Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.


Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.


Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.


mysql> UPDATE user SET Password=PASSWORD('xxxxx') where USER='root';
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4 Changed: 4 Warnings: 0

mysql> grant all on *.* to root@'%' identified by "xxxxxx";
Query OK, 0 rows affected (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)


mysql> quit
Bye

[root@mysqldb1 ~]# /etc/init.d/mysql restart
Shutting down MySQL..160606 15:25:46 mysqld_safe mysqld from pid file /var/lib/mysql/mysqldb1.pid ended
[ OK ]
Starting MySQL.[ OK ]
[1]+ Donemysqld_safe --user=mysql --skip-grant-tables --skip-networking
[root@mysqldb1 ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.31


Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.


Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.


Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.


mysql>
mysql>