mysql5.7相比较mysql5.6而言，有很大进步，特别对于安装来说，要简单得多。现将方法简介而下。
前两步和安装mysql5.6相同。
1、卸载mariadb
rpm -e mariadb-libs-5.5.37-1.el7_0.x86_64
###会提示错误：依赖检测失败
###加上–nodeps参数强制卸载
rpm -e –nodeps mariadb-libs-5.5.37-1.el7_0.x86_64
如果找不到就用yum -y remove mariadb-libs.x86_64
2、下载mysql5.7
进入mysql下载官网，点击左上方的“Community”，选择平台“Red Hat Enterprise Linux”，下载此版本下的mysql-5.7.11-1.el7.x86_64.rpm-bundle.tar（大小为520.7M），如果点击Download会提示你要先登录Oracle帐户，如果没有帐户或者不想登录，可以点击下方的“No thanks,just start my download”，也可一个FTP站点下载，里面包含了几乎所有的mysql版本。
3、安装
解压：tar xvf mysql-5.7.11-1.el7.x86_64.rpm-bundle.tar ,先安装“rpm -ivh mysql-community-common-5.7.11-1.el7.x86_64.rpm”,然后“mysql-community-libs-5.7.11-1.el7.x86_64.rpm”，再“mysql-community-client-5.7.11-1.el7.x86_64.rpm”，“mysql-community-devel-5.7.11-1.el7.x86_64.rpm”，最后“mysql-community-server-5.7.11-1.el7.x86_64.rpm”。
安装后mysql的主要文件如下：
MySQL Installation Layout for Linux RPM Packages from the MySQL Developer Zone
| Files or Resources | Location |
| Client programs and scripts | /usr/bin |
| mysqld server | /usr/sbin |
| Configuration file | /etc/my.cnf |
| Data directory | /var/lib/mysql |
| Error log file |
For RHEL, Oracle Linux, CentOS or Fedora platforms: /var/log/mysqld.log
For SLES: /var/log/mysql/mysqld.log |
| Value of secure_file_priv | /var/lib/mysql-files |
| System V init script |
For RHEL, Oracle Linux, CentOS or Fedora platforms: /etc/init.d/mysqld
For SLES: /etc/init.d/mysql |
| Systemd service |
For RHEL, Oracle Linux, CentOS or Fedora platforms: mysqld
For SLES: mysql |
| Pid file | /var/run/mysql/mysqld.pid |
| Socket | /var/lib/mysql/mysql.sock |
| Keyring directory | /var/lib/mysql-keyring |
| Unix manual pages | /usr/share/man |
| Include (header) files /usr/include/mysql | |
| Libraries | /usr/lib/mysql |
| Miscellaneous support files (for example, error messages, and character set files) | /usr/share/mysql |
3、初始化
切换到root用户，启动服务“service mysqld start”，找到root用户的初始密码“grep ‘temporary password’ /var/log/mysqld.log”，用找到的密码登录root用户“mysql -uroot -p ”，改密码“mysql> ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘yourpasswd’; ”。
