一、检查系统是否安装其他版本的MYSQL数据
yum list installed | grep mysql
yum -y remove mysql-libs.x86_64

二、安装及配置
wget http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm
rpm -ivh mysql-community-release-el6-5.noarch.rpm
yum repolist all | grep mysql
1、安装MYSQL数据库
yum install mysql-community-server -y

2、设置为开机启动
chkconfig --list | grep mysqld
chkconfig mysqld on

3、设置密码
/usr/bin/mysqladmin -u root password '123456'

4、修改root密码
mysql -uroot -p123456

mysql> select Host,User,Password from user where User='root';
+-----------------------+------+-------------------------------------------+
| Host                  | User | Password                                  |
+-----------------------+------+-------------------------------------------+
| localhost             | root | *4A82FDF1D80BA7470BA2E17FEEFD5A53D5D3B762 |
| localhost.localdomain | root |                                           |
| 127.0.0.1             | root |                                           |
| ::1                   | root |                                           |
+-----------------------+------+-------------------------------------------+
4 rows in set (0.00 sec)

mysql> update user set Password = password('123456') where User='root';
Query OK, 4 rows affected (0.03 sec)
Rows matched: 4  Changed: 4  Warnings: 0

mysql> select Host,User,Password from user where User='root';
+-----------------------+------+-------------------------------------------+
| Host                  | User | Password                                  |
+-----------------------+------+-------------------------------------------+
| localhost             | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| localhost.localdomain | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| 127.0.0.1             | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| ::1                   | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+-----------------------+------+-------------------------------------------+
4 rows in set (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

5、建立远程root用户
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '你设置的密码' WITH GRANT OPTION;
mysql> flush privileges;
6、设置utf-8编码

查看mysql原本编码：
mysql> show variables like 'character%';
设置编码
# vi /etc/my.cnf
如下(少补)：
[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci
sql_mode='NO_ENGINE_SUBSTITUTION'
[mysql]
default-character-set = utf8
[mysql.server]
default-character-set = utf8
[mysqld_safe]
default-character-set = utf8
[client]
default-character-set = utf8
重启mysql
# service mysqld restart
再次查看编码：
# mysql -uroot -p
mysql> show variables like 'character%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)