系统版本：

Red Hat Enterprise Linux Server release 7.3 (Maipo)

yum install mysql-community-common

yum install mysql-community-client

yum install mysql-community-server

在安装mysql5.7数据库的时候，在安装mysql-community-server包的时候提示缺少libsasl2.so.2()(64bit)

解决方法：

vim /etc/yum.repos.d/mysql-community.repo

[mysql57-community]

name=MySQL 5.7 Community Server

## baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/

baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/

enabled=1

gpgcheck=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

再次安装：

yum install mysql-community-server

启动数据库：

service mysqld start

或

systemctl start mysqld

关闭数据库：

service mysqld stop

或

systemctl stop mysqld

初始化：

mysqld --initialize --user=mysql --basedir=/data/my --datadir=/data/my/data &

设置开机启动：

systemctl enable mysqld

systemctl daemon-reload