下載包
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
安裝
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
報錯
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：我們安裝的包mysql-community-common-5.7.9被原有的mariadb-libs-1:5.5.68阻擋了，卸載掉就可以正常安裝
[root@iZn7w017u39406y7sqxcanZ install]# rpm -qa | grep mariadb
mariadb-libs-5.5.68-1.el7.x86_64
[root@iZn7w017u39406y7sqxcanZ install]# yum -y remove mariadb-libs
