file /usr/share/mysql/charsets/swe7.xml from install of MySQL-server-5.6.30-1.el6.x86_64 conflicts with file from package mariadb-libs-1:5.5.68-1.el7.x86_64
此报错是说mysql安装包与mariadb包冲突，那么那么只要删除mariadb包即可。
1.查询冲突的内容
rpm -qa|grep -i mariadb
2.删除冲突的包
yum remove mariadb-libs-5.5.60-1.el7_5.x86_64
问题：
安装MySQL时报错：FATAL ERROR: please install the following Perl modules before executing /usr/bin/mysql_install_db:
Data::Dumper
原因：
缺少依赖包autoconf
解决办法：
通过yum安装autoconf
yum -y install autoconf
