腾讯云主机安装登录mysql失败--解决方案[重置root密码并实现远程连接]

登录MySQL时报错：Access denied for user 'root'@'localhost' (using password: YES)

解决步骤：

1、使用ssh工具连接主机，使用mysqld_safe命令进入安全模式：

Last login: Thu Jun 22 09:56:57 2017 from 182.50.118.228
[root@VM_219_131_centos ~]# service msyqld status
msyqld: unrecognized service
[root@VM_219_131_centos ~]# service mysqld stop
Stopping mysqld:  [  OK  ]
[root@VM_219_131_centos ~]# service msyqld status
msyqld: unrecognized service
[root@VM_219_131_centos ~]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 4436
[root@VM_219_131_centos ~]# 170622 09:58:15 mysqld_safe Logging to '/var/log/mysqld.log'.
170622 09:58:15 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
170622 10:02:45 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended

2、再打开一个窗口，连接MySQL，就可以为root用户设置密码了：

Last login: Thu Jun 22 09:57:25 2017 from 182.50.118.228
[root@VM_219_131_centos ~]# mysql -uroot 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: 5.1.73 Source distribution

Copyright (c) 2000, 2013, 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('你的密码') where USER='root' and host='root' or host='localhost';
Query OK, 2 rows affected (0.03 sec)
Rows matched: 2  Changed: 2  Warnings: 0

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

mysql> quit
Bye
[root@VM_219_131_centos ~]# 

3、打开远程连接权限：

Last login: Thu Jun 22 09:58:24 2017 from 182.50.118.228
[root@VM_219_131_centos ~]# service mysqld status
mysqld (pid  4532) is running...
[root@VM_219_131_centos ~]# service mysqld restart
Stopping mysqld:  [  OK  ]
Starting mysqld:  [  OK  ]
[root@VM_219_131_centos ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, 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> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.00 sec)

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '你的密码' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)

mysql> 

4、使用Navicat工具远程连接，点击左下角的"连接测试"，连接成功：