1.檢視作業系統相關資訊。

[[email protected] ~]# cat /etc/issue 
CentOS release 6.5 (Final) 
Kernel \r on an \m 
[[email protected] ~]# uname -a 
Linux linuxidc 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

2.建立需要下載rpm軟體包的目錄。
1 [[email protected] ~]# mkdir -p /taokey/tools

3.檢視下是否有系統自帶mysql的rpm包，如果有，需要刪除自帶的舊rpm包。
[[email protected] ~]# rpm -qa | grep mysql 
mysql-libs-5.1.71-1.el6.x86_64 
[[email protected] ~]# yum -y remove mysql-libs-5.1* 
[[email protected] ~]# rpm -qa | grep mysql 
[[email protected] ~]#

4.在MySQL官網下載安裝MySQL-5.6.21所需的rpm軟體包。
需要下載三個rpm軟體包：
MySQL-client-5.6.21-1.rhel5.x86_64.rpm  
MySQL-devel-5.6.21-1.rhel5.x86_64.rpm  
MySQL-server-5.6.21-1.rhel5.x86_64.rpm 
[

[email protected] ~]# cd /taokey/tools/ 
[[email protected] tools]# wget http://dev.mysql.com/Downloads/MySQL-5.6/MySQL-server-5.6.21-1.rhel5.x86_64.rpm 
[[email protected] tools]# wget http://dev.mysql.com/Downloads/MySQL-5.6/MySQL-devel-5.6.21-1.rhel5.x86_64.rpm 
[[email protected] tools]# wget http://dev.mysql.com/Downloads/MySQL-5.6/MySQL-client-5.6.21-1.rhel5.x86_64.rpm

5.下載完之後，安裝三個rpm軟體包。
[[email protected] tools]# rpm -ivh MySQL-server-5.6.21-1.rhel5.x86_64.rpm 
error: Failed dependencies:
        libaio.so.1()(64bit) is needed by MySQL-server-5.6.21-1.rhel5.x86_64
        libaio.so.1(LIBAIO_0.1)(64bit) is needed by MySQL-server-5.6.21-1.rhel5.x86_64
        libaio.so.1(LIBAIO_0.4)(64bit) is needed by MySQL-server-5.6.21-1.rhel5.x86_64
安裝MySQL-server報錯，原因是沒有安裝libaio，系統缺少libaio.so此軟體包，下邊yum安裝一下libaio.so軟體包。
[[email protected] tools]# yum install -y libaio 
[[email protected] tools]# rpm -ivh MySQL-server-5.6.21-1.rhel5.x86_64.rpm 
[[email protected] tools]# rpm -ivh MySQL-client-5.6.21-1.rhel5.x86_64.rpm  
Preparing...                ########################################### [100%] 
  1:MySQL-client          ########################################### [100%] 
[[email protected] tools]# rpm -ivh MySQL-devel-5.6.21-1.rhel5.x86_64.rpm  
Preparing...                ########################################### [100%] 
  1:MySQL-devel            ########################################### [100%]

6.修改配置檔案位置。
[[email protected] tools]# cp /usr/share/mysql/my-default.cnf /etc/my.cnf

7.初始化MySQL及修改MySQL預設的root密碼。
[[email protected] tools]# /usr/bin/mysql_install_db 
[[email protected] tools]# ps -ef | grep mysql 
root      2188    1  0 14:48 pts/1    00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/linuxidc.pid 
mysql    2303  2188 30 14:48 pts/1    00:00:02 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/linuxidc.err --pid-file=/var/lib/mysql/linuxidc.pid 
root      2331  1853  0 14:49 pts/1    00:00:00 grep mysql 
[[email protected] tools]# netstat -anpt | grep 3306 
tcp        0      0 :::3306                    :::*                        LISTEN      2303/mysqld
[[email protected] tools]# more /root/.mysql_secret 
# The random password set for the root user at Thu Apr  9 14:43:59 2015 (local time): F6K3v_xggFoLQeiN 
  
[[email protected] tools]# mysql -uroot -pF6K3v_xggFoLQeiN 
Warning: Using a password on the command line interface can be insecure. 
Welcome to the MySQL monitor.  Commands end with ; or \g. 
Your MySQL connection id is 1 
Server version: 5.6.21 
  
Copyright (c) 2000, 2014, 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> SET PASSWORD = PASSWORD('123.com');  
mysql> exit
Bye 
[[email protected] tools]# mysql -uroot -p123.com 
Warning: Using a password on the command line interface can be insecure. 
Welcome to the MySQL monitor.  Commands end with ; or \g. 
Your MySQL connection id is 6 
Server version: 5.6.21 MySQL Community Server (GPL) 
  
Copyright (c) 2000, 2014, 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>

8.設定MySQL服務開機自啟動。
[[email protected] tools]# chkconfig mysql on 
[[email protected] tools]# chkconfig mysql --list 
mysql          0:off  1:off  2:on    3:on    4:on    5:on    6:off

到此為止，使用RPM安裝MySQL5.6版本資料庫安裝完畢，謝謝大家。