1.查看版本

[root@localhost ~]# cat /etc/redhat-release

CentOS Linux release 7.6.1810 (Core)

2.将mysql yum添加到系统的仓库列表中

wget https://dev.mysql.com/get/mysql57-community-release-el7-3.noarch.rpm

yum localinstall https://dev.mysql.com/get/mysql57-community-release-el7-3.noarch.rpm

3.验证安装

[root@localhost ~]# yum repolist enabled | grep ‘mysql.*-community.*’

mysql-connectors-community/x86_64       MySQL Connectors Community           108

mysql-tools-community/x86_64            MySQL Tools Community                 90

mysql57-community/x86_64                MySQL 5.7 Community Server           347

4.确认要安装的MYSQL版本

[root@localhost ~]# yum repolist all | grep mysql5

mysql55-community/x86_64          MySQL 5.5 Community Server        禁用

mysql55-community-source          MySQL 5.5 Community Server – Sour 禁用

mysql56-community/x86_64          MySQL 5.6 Community Server        禁用

mysql56-community-source          MySQL 5.6 Community Server – Sour 禁用

mysql57-community/x86_64          MySQL 5.7 Community Server        启用:    347

mysql57-community-source          MySQL 5.7 Community Server – Sour 禁用

5.安装

yum install mysql-community-server

6.查看root的初始密码

[root@localhost ~]# cat /var/log/mysqld.log | grep generated

2019-05-28T12:20:44.090447Z 1 [Note] A temporary password is generated for root@localhost: vtK#Bt?Hl35u

7.修改root密码

set password for root@localhost=password(‘vtK#Bt?Hl35u’);