1、查看是否已經安裝過mysql或其依賴，若已裝過要先將其刪除，否則第4步使用yum安裝時會報錯：

方法一：yum list installed | grep mysql
方法二：rpm -qa |grep mysql

2、下載載mysql57-community-release-el6-5.noarch.rpm
wget https://repo.mysql.com//mysql57-community-release-el5-8.noarch.rpm --no-check-certificate

（下載站點：https://dev.mysql.com/downloads/repo/yum/）

3、安裝rpm文件

4、查看mysql5.7是否啟用
yum repolist enabled | grep mysql

5、安裝mysql
yum install mysql-community-server

6、啟動mysql服務，初始化
service mysqld start

7、查看密碼登錄並修改密碼
grep "password" /var/log/mysqld.log

update mysql.user set authentication_string=password(‘wclwcw1101!‘) where user=‘root‘ and Host = ‘localhost‘;

CentOS6.5安裝MySQL5.7(也適合其他版本安裝)