Centos: config mysql server

1. install mysql server on centos

a) wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
b) rpm -ivh mysql-community-release-el7-5.noarch.rpm
c) yum install mysql-community-server
d) service mysqld restart

2. set password for 'root'

a) # mysql -u root
b) mysql> use mysql;
c) mysql> update user set password=PASSWORD(‘your_password’) where User='root';

3. add new user

a) create user 'username'@'xxx.xxx.xxx.xxx' identified by 'password'; ('%' match any ip address)
a) mysql> select host,user from user; (check the privileges)

4. grant privileges for the user

a) grant all privileges on *.* to 'username'@'xxx.xxx.xxx.xxx' identified by ‘password’ with grant option;
b) select host,user from user; (check the privileges) 

5. allow firewall accept port 3306

a) # firewall-cmd --add-service=mysql --permanent
    success
b) # firewall-cmd --reload
    success
c) iptables -L -n | grep 3306 (check whether port 3306 is accept)
    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:3306 ctstate NEW
d) firewall-cmd --state (check the state of the firewall)
     running

6. try to access mysql from remote host

a) mysql -h "xxx.xxx.xxx.xxx" -u username -p