By default, MySQL can be connected in your mysql-server locally. You may determine to access your MySQL database to local machine remotely , should give remote permission in mysql server.

Find out your user permission status :

mysql> SELECT * from information_schema.user_privileges where grantee like "'linux_user'%";

+-------------------------------+------------------------+-----------------------------+---------------+
| GRANTEE                   |  TABLE_CATALOG  |  PRIVILEGE_TYPE  |  IS_GRANTABLE |
+-------------------------------+-----------------------+------------------------------+----------------+
| 'linux_user'@'localhost'|      def                      | USAGE                    | NO         
+-------------------------------+------------------------+-----------------------------+----------------+

Before giving permission to check your configuration my.cnf file,
 
vim /etc/mysql/my.cnf

Command the two lines may available in my.cnf file:
 
#bind-address           = 127.0.0.1
#skip-networking

Can be set different type of remote permission for usage,

Remote permission to all machines:
 
GRANT ALL PRIVILEGES ON *.* TO 'linux_user'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;

Remote permission specific database:
 
GRANT ALL PRIVILEGES ON your_database.* TO ' linux_user '@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;

Remote permission from specific IP Address.
 
 GRANT ALL PRIVILEGES ON *.* TO ' linux_user '@'192.168.0.30' IDENTIFIED BY 'password' WITH GRANT OPTION;

Remote permission specific database and IP Address:
 
 GRANT ALL PRIVILEGES ON your_database.* TO ' linux_user '@'192.168.0.30' IDENTIFIED BY 'password' WITH GRANT OPTION;

mysql> FLUSH PRIVILEGES;
mysql> quit

Check whether mysql is listening properly,
SELECT * from information_schema.user_privileges where grantee like "'linux_user'%";

Test your remote database connection from terminal/command-line:
 
# mysql -h 192.168.0.30 -u linux_user –p
Enter Password:

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9131
Server version: 5.1.73-cll MySQL Community Server (GPLv2)
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> show databases;
+-------------------------+
| Database                |
+-------------------------+
| information_schema |
| your_database         |
+--------------------------+
2 rows in set (0.00 sec)