[原]MySQL 5.7.4 for Red Hat Enterprise 7（RHEL7）的安装
远观历史， MySQL的主要目的是为了能够在单处理器核心的商业服务器上运行。如今MySQL的一个变化用户可能不会注意到，那就是甲骨文已经开始重新架构MySQL的代码，使它大量的模块化。如软件解析器，优化和复制功能以模块化的形式被重写。
该版本的查询性能得以大幅提升，比 MySQL 5.6 提升 1 倍,新版本的 MySQL 在测试平台上可达到每秒 512000 只读 QPS，而 MySQL 5.6 最高只能到 250000 QPS。该性能的提升是通过其 Memcached 插件实现的。同时该版本在数据库其他方面也得到不少改进，例如降低了建立数据库连接的时间，此举得益于 Facebook 的贡献。
相关mysql视频教程推荐：《mysql教程》
1.首先我们了解MySQL的特性
MySQL的特性
使用C和C++编写，并使用了多种编译器进行测试，保证源代码的可移植性。
支持AIX、BSDi、FreeBSD、HP-UX、Linux、Mac OS、Novell Netware、NetBSD、OpenBSD、OS/2 Wrap、Solaris、SunOS、Windows等多种操作系统。
为多种编程语言提供了API。这些编程语言包括C、C++、C#、Delphi、Eiffel、Java、Perl、PHP、Python、Ruby和Tcl等。
支持多线程，充分利用CPU资源，支持多用户。
优化的SQL查询算法，有效地提高查询速度。
既能够作为一个单独的应用程序应用在客户端服务器网络环境中，也能够作为一个库而嵌入到其他的软件中。
提供多语言支持，常见的编码如中文的GB 2312、BIG5，日文的Shift_JIS等都可以用作数据表名和数据列名。
提供TCP/IP、ODBC和JDBC等多种数据库连接途径。
提供用于管理、检查、优化数据库操作的管理工具。
可以处理拥有上千万条记录的大型数据库。
中文 MySQL 文档：http://tool.oschina.net/apidocs/apidoc?api=mysql-5.1-zh
英文 MySQL 文档：http://tool.oschina.net/apidocs/apidoc?api=mysql-5.5-en
2.下面我们开始下载MySQL
打开 http://dev.mysql.com/downloads/mysql/ 选择开发者版本
选择RHEL的版本
下载你需要的对应的x86架构的 32或者64位的mysql的版本 点击下载
选择现在下载 或者下载工具打开
http://cdn.mysql.com/Downloads/MySQL-5.7/MySQL-5.7.4-m14-0.2.m14.el7.x86_64.rpm-bundle.tar
3.将MySQL传送进虚拟机里面
启动RHEL7 我们需要用root用户安装 为了更加直接我们直接用root登陆
4.释放安装包： tar -xvf MySQL-5.7.4-m14-0.2.m14.el7.x86_64.rpm-bundle.tar
5.下面开始安装
显示出有冲突 我应该卸载掉原有的软件mariadb-devel 和 mariadb
rpm -e --nodeps mariadb-libs-5.5.33a-3.el7.x86_64 rpm -ivh mysql-community-common-5.7.4-0.2.m14.el7.x86_64.rpm rpm -ivh mysql-community-libs-5.7.4-0.2.m14.el7.x86_64.rpm rpm -ivh mysql-community-embedded-5.7.4-0.2.m14.el7.x86_64.rpm
rpm -e mariadb-devel –nodeps
rpm -e mariadb –nodeps rpm -ivh mysql-community-devel-5.7.4-0.2.m14.el7.x86_64.rpm rpm -ivh mysql-community-embedded-devel-5.7.4-0.2.m14.el7.x86_64.rpm rpm -ivh mysql-community-client-5.7.4-0.2.m14.el7.x86_64.rpm
在虚拟机的光驱上挂载上你的镜像
进入iso文件 安装好几个依赖包
rpm -ivh perl-Net-Daemon-0.48-4.el7.noarch.rpm rpm -ivh perl-PlRPC-0.2020-12.el7.noarch.rpm rpm -ivh perl-DBI-1.627-1.el7.x86_64.rpm
工作路径返回到桌面 然后继续安装我们的server
rpm -ivh mysql-community-server-5.7.4-0.2.m14.el7.x86_64.rpm
6.更改用户密码
Server安装完了 我们就查找一下秘钥文件
find / -name .mysql_secret
登陆mysql的时候用root用户被拒绝访问了 所以我们切换用户
再次登陆
更换密码成一个简单一点的 示例中为123456
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