系统环境信息
　　CentOS release 6.3 (Final)
　　VMware? Workstation 9.0.0 build-812388
　　rpm安装包准备
　　1 从光盘拷贝如下安装包到指定目录
　　2 也可以从RPM资源网站下载到本地环境
　　perl-DBI-1.609-4.el6.i686.rpm
　　mysql-libs-5.1.61-4.el6.i686.rpm
　　mysql-5.1.61-4.el6.i686.rpm
　　perl-DBD-MySQL-4.013-3.el6.i686.rpm
　　mysql-server-5.1.61-4.el6.i686.rpm
　　目录名称
　　/usr/dev/mysql
　　卸除原有MYSQL服务
　　操作步骤
　　#cd /usr/dev
　　#rpm -ivh perl-DBI-1.609-4.el6.i686.rpm
　　#rpm -ivh mysql-libs-5.1.61-4.el6.i686.rpm
　　#rpm -ivh mysql-5.1.61-4.el6.i686.rpm
　　#rpm -ivh perl-DBD-MySQL-4.013-3.el6.i686.rpm
　　#rpm -ivh mysql-server-5.1.61-4.el6.i686.rpm
　　#/usr/bin/mysql_install_db --user=mysql
　　#/usr/bin/mysqld_safe &
　　#/etc/init.d/mysqld status
　　备注
　　命令7含义 初始化MYSQL数据库 该命令用来初始化 mysql数据库，即创建/var/lib/mysql目录
　　命令8含义 启动MYSQL服务
　　命令9含义 查看MYSQL启动状态
　　执行命令7后显示如下信息
　　========================================================
　　Installing MySQL system tables...
　　OK
　　Filling help tables...
　　OK
　　To start mysqld at boot time you have to copy
　　support-files/mysql.server to the right place for your system
　　PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
　　To do so, start the server, then issue the following commands:
　　/usr/bin/mysqladmin -u root password 'new-password'
　　/usr/bin/mysqladmin -u root -h localhost.localdomain password 'new-password'
　　Alternatively you can run:
　　/usr/bin/mysql_secure_installation
　　which will also give you the option of removing the test
　　databases and anonymous user created by default.  This is
　　strongly recommended for production servers.
　　See the manual for more instructions.
　　You can start the MySQL daemon with:
　　cd /usr ; /usr/bin/mysqld_safe &
　　You can test the MySQL daemon with mysql-test-run.pl
　　cd /usr/mysql-test ; perl mysql-test-run.pl
　　Please report any problems with the /usr/bin/mysqlbug script!
　　================================================
　　执行命令8后显示如下信息
　　================================================
　　mysqld_safe Logging to '/var/log/mysqld.log'.
　　mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
　　================================================
　　执行命令9后显示如下信息
　　================================================
　　mysqld (pid  4200) is running...
　　================================================