下载包
wget https://cdn.mysql.com/archives/mysql-5.7/mysql-community-common-5.7.9-1.el7.x86_64.rpm
wget https://cdn.mysql.com/archives/mysql-5.7/mysql-community-libs-5.7.9-1.el7.x86_64.rpm
wget https://cdn.mysql.com/archives/mysql-5.7/mysql-community-client-5.7.9-1.el7.x86_64.rpm
安装
yum install -y mysql-community-common-5.7.9-1.el7.x86_64.rpm
yum install -y mysql-community-libs-5.7.9-1.el7.x86_64.rpm
yum install -y mysql-community-client-5.7.9-1.el7.x86_64.rpm
报错
file /usr/share/mysql/charsets/latin2.xml from install of mysql-community-common-5.7.9-1.el7.x86_64 conflicts with file from package mariadb-libs-1:5.5.68-1.el7.x86_64
file /usr/share/mysql/charsets/latin5.xml from install of mysql-community-common-5.7.9-1.el7.x86_64 conflicts with file from package mariadb-libs-1:5.5.68-1.el7.x86_64
file /usr/share/mysql/charsets/latin7.xml from install of mysql-community-common-5.7.9-1.el7.x86_64 conflicts with file from package mariadb-libs-1:5.5.68-1.el7.x86_64
file /usr/share/mysql/charsets/macce.xml from install of mysql-community-common-5.7.9-1.el7.x86_64 conflicts with file from package mariadb-libs-1:5.5.68-1.el7.x86_64
file /usr/share/mysql/charsets/macroman.xml from install of mysql-community-common-5.7.9-1.el7.x86_64 conflicts with file from package mariadb-libs-1:5.5.68-1.el7.x86_64
file /usr/share/mysql/charsets/swe7.xml from install of mysql-community-common-5.7.9-1.el7.x86_64 conflicts with file from package mariadb-libs-1:5.5.68-1.el7.x86_64
原因：我们安装的包mysql-community-common-5.7.9被原有的mariadb-libs-1:5.5.68阻挡了，卸载掉就可以正常安装
[root@iZn7w017u39406y7sqxcanZ install]# rpm -qa | grep mariadb
mariadb-libs-5.5.68-1.el7.x86_64
[root@iZn7w017u39406y7sqxcanZ install]# yum -y remove mariadb-libs
