安装rpm包
rpm -ivh --nodeps --force xxxxx.rpm
查询安装路径
rpm -qpl xxxx.rpm
查询已安装的rpm
rpm -qa | grep ncurses-devel
卸载rpm包
rpm -e xxx.rpm
只下载RPM包，不安装
yum reinstall --downloadonly --downloaddir=./ ncurses-devel-5.9-14.20130511.el7_4.x86_64