自从oracle收购Mysql后，略微发生了一些小小的变化，原来mysql安装完成后默认是没有密码的，但是新版的mysql安装完成后oracle提供了一个free password放着/root/.mysql_secret文件中，下面详细描述一下在redhat6.2上的安装过程

在oracle官网上下载http://www.mysql.com/downloads/对应操作系统的包

下面是网上找的一篇比较全面的安装文档，mysql的安装还是相当简单的，我个人推荐使用rpm包安装方式。

现在在oracle官网上下载的mysql有以下几个rpm包

MySQL-client-advanced

MySQL-devel-advanced

MySQL-embedded-advanced-5.6.14-1.rhel5.x86_64.rpm

MySQL-server-advanced-5.6.14-1.rhel5.x86_64.rpm

MySQL-shared-advanced-5.6.14-1.rhel5.x86_64.rpm

MySQL-shared-compat-advanced-5.6.14-1.rhel5.x86_64.rpm

MySQL-test-advanced-5.6.14-1.rhel5.x86_64.rpm

1、先把系统里安装的所有mysql找出来

#rpm -qa | grep -i mysql 运行此命令后，显示所有列表：

mysqlclient10-3.23.58-4.RHEL4.1

mysqlclient10-devel-3.23.58-4.RHEL4.1

2、将列表一一强制删除：

#rpm -ev --nodeps mysqlclient10-3.23.58-4.RHEL4.1

#rpm -ev --nodeps mysqlclient10-devel-3.23.58-4.RHEL4.1

3、将老版本的几个文件手工删除：

#rm -f /etc/my.cnf

#rm -rf /var/lib/mysql

#rm -rf/var/share/mysql

# rm -rf/usr/bin/mysql*

 4.安装下载的版本的mysql,如上,

[root@oracle11 ~]#rpm -ivh MySQL-server-advanced-5.6.14-1.el6.x86_64.rpm

Preparing...               ########################################### [100%]

   1:MySQL-server-advanced  ###########################################[100%]

5.安装client

[root@oracle11 ~]#rpm -ivh MySQL-client-advanced-5.6.14-1.el6.x86_64.rpm

Preparing...               ########################################### [100%]

   1:MySQL-client-advanced  ###########################################[100%]

说明:不安装mysql-client是不能使用mysql工具登陆到mysql数据库

6.oracle收购Mysql后,新版的mysql刚安装完mysql后不能直接输入mysql登录数据库,而是设置了默认free password密码,默认密码放在了/root/.mysql_secret文件中,登陆后需要修改密码

安装完成后有这么一段话,

A RANDOMPASSWORD HAS BEEN SET FOR THE MySQL root USER !

You willfind that password in '/root/.mysql_secret'.

You must change thatpassword on your first connect,

no other statementbut 'SET PASSWORD' will beaccepted.

See the manual forthe semantics of the 'password expired' flag.

Also, the accountfor the anonymous user has been removed.

In addition, you canrun:

  /usr/bin/mysql_secure_installation

which will also giveyou the option of removing the test database.

This is stronglyrecommended for production servers.

See the manual formore instructions.

Please report anyproblems with the /usr/bin/mysqlbug script!

The latestinformation about MySQL is available on the web at

  http://www.mysql.com

Support MySQL bybuying support/licenses at http://shop.mysql.com

New default configfile was created as /usr/my.cnf and

will be used bydefault by the server when you start it.

You may edit thisfile to change server settings

7.修改密码

(1)查看文件寻找密码

[root@oracle11 ~]#vi /root/.mysql_secret

# The randompassword set