安装过程遇到不少问题， 最终解决，下面分享下，希望对各位朋友有一定帮助。
一、下载mysql服务端、客户端、库和包含文件、模块
wget -c http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-server-5.5.30-1.el6.x86_64.rpm/from/http://mysql.spd.co.il/ wget -c http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-client-5.5.30-1.el6.x86_64.rpm/from/http://mysql.spd.co.il/ wget -c http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-devel-5.5.30-1.el6.x86_64.rpm/from/http://mysql.spd.co.il/
二、安装mysql服务端、客户端、库和包含文件、模块
rpm -ivh MySQL-server-5.5.30-1.el6.x86_64.rpm --nodeps --force rpm -ivh MySQL-client-5.5.30-1.el6.x86_64.rpm --nodeps --force rpm -ivh MySQL-devel-5.5.30-1.el6.x86_64.rpm --nodeps --force
安装好mysql发现无法启动查看日志，提示:加载共享库时出错xxxxxxxxxxxx 缺少libaio 错误如下：
[root@MyCloudServer ~]# service mysql startStarting MySQL. ERROR! The server quit without updating PID file (/var/lib/mysql/MyCloudServer.pid).[root@MyCloudServer ~]# cat /var/log/mysqld.log 150703 13:45:11 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql/usr/sbin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory150703 13:45:11 mysqld_safe mysqld from pid file /var/lib/mysql/MyCloudServer.pid ended
三、安装libaio
yum install libaio
安装好后还是提示错误，错误如下：
InnoDB: Foreign key constraint system tables created 150703 13:48:26 InnoDB: Waiting for the background threads to start 150703 13:48:27 InnoDB: 5.5.30 started; log sequence number 0 150703 13:48:27 [Note] Server hostname (bind-address): \'0.0.0.0\'; port: 3306 150703 13:48:27 [Note] - \'0.0.0.0\' resolves to \'0.0.0.0\'; 150703 13:48:27 [Note] Server socket created on IP: \'0.0.0.0\'. 150703 13:48:27 [ERROR] Fatal error: Can\'t open and lock privilege tables: Table \'mysql.host\' doesn\'t exist 150703 13:48:27 mysqld_safe mysqld from pid file /var/lib/mysql/MyCloudServer.pid ended
四、初始化数据库
mysql_install_db
五、修改mysql数据库密码，默认空密码 直接输入mysql回车登录。
mysql>use mysql; mysql> update user set password=passworD(\"test\") where user=\'root\'; mysql> flush privileges; mysql> exit;
卸载请执行：rpm -qa | grep -i mysql 查看已安装的包 再执行rpm -e MySQL-xxxxxxxxxxxxx
本次测试系统为centos6.4 64位 成功安装mysql5.5数据库，上为本人安装过程。
