本文操作系统: CentOS 7.2.1511 x86_64
MySQL 版本: 5.7.13

1、卸载系统自带的 mariadb-lib

[root@centos-linux ~]# rpm -qa|grep mariadb mariadb-libs-5.5.44-2.el7.centos.x86_64 [root@centos-linux ~]# rpm -e mariadb-libs-5.5.44-2.el7.centos.x86_64 --nodeps 

2、下载 rpm 安装包

去官网找到最新的 rpm 集合包。现在最新的是 mysql-5.7.13-1.el7.x86_64.rpm-bundle.tar

复制其下载地址，在服务器下载 (或者本地下载了上传至服务器)。

[root@centos-linux ~]# wget http://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.13-1.el7.x86_64.rpm-bundle.tar 

然后解压

[root@centos-linux ~]# ls mysql-5.7.13-1.el7.x86_64.rpm-bundle.tar [root@centos-linux ~]# tar xvf mysql-5.7.13-1.el7.x86_64.rpm-bundle.tar mysql-community-test-5.7.13-1.el7.x86_64.rpm mysql-community-embedded-5.7.13-1.el7.x86_64.rpm mysql-community-embedded-compat-5.7.13-1.el7.x86_64.rpm mysql-community-server-5.7.13-1.el7.x86_64.rpm mysql-community-client-5.7.13-1.el7.x86_64.rpm mysql-community-common-5.7.13-1.el7.x86_64.rpm mysql-community-server-minimal-5.7.13-1.el7.x86_64.rpm mysql-community-embedded-devel-5.7.13-1.el7.x86_64.rpm mysql-community-devel-5.7.13-1.el7.x86_64.rpm mysql-community-libs-compat-5.7.13-1.el7.x86_64.rpm mysql-community-libs-5.7.13-1.el7.x86_64.rpm mysql-community-minimal-debuginfo-5.7.13-1.el7.x86_64.rpm 

3、安装

依次执行（几个包有依赖关系，所以执行有先后）下面命令安装

[root@centos-linux ~]# rpm -ivh mysql-community-common-5.7.13-1.el7.x86_64.rpm [root@centos-linux ~]# rpm -ivh mysql-community-libs-5.7.13-1.el7.x86_64.rpm [root@centos-linux ~]# rpm -ivh mysql-community-client-5.7.13-1.el7.x86_64.rpm [root@centos-linux ~]# rpm -ivh mysql-community-server-5.7.13-1.el7.x86_64.rpm 

4、数据库初始化

在 *nix 系统中，为了保证数据库目录为与文件的所有者为 mysql 登陆用户，如果你是以 root 身份运行 mysql 服务，需要执行下面的命令初始化

mysqld --initialize --user=mysql 

如果是以 mysql 身份运行，则可以去掉 --user 选项。

另外 --initialize 选项默认以“安全”模式来初始化，则会为 root 用户生成一个密码并将该密码标记为过期，登陆后你需要设置一个新的密码，而使用 --initialize-insecure 命令则不使用安全模式，则不会为 root 用户生成一个密码。

这里演示使用的 --initialize 初始化的，会生成一个 root 账户密码，密码在log文件里

[root@centos-linux ~]# cat /var/log/mysqld.log 2016-07-16T07:56:38.282824Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2016-07-16T07:56:38.422114Z 0 [Warning] InnoDB: New log files created, LSN=45790 2016-07-16T07:56:38.449315Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2016-07-16T07:56:38.457910Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: d3261dbf-4b2a-11e6-86ef-001c4260563f. 2016-07-16T07:56:38.458976Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2016-07-16T07:56:38.459524Z 1 [Note] A temporary password is generated for root@localhost: hm9dKgzQdm:W 

上图里的最后一行则给出了生成的密码，现在就可以启动数据库了，然后使用上面的密码登陆。

[root@centos-linux ~]# systemctl start mysqld [root@centos-linux ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.13 Copyright (c) 2000, 2016, 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