帮我看看我的这个fedora 23 dnf 安装什么都报错

clean 一下再试试

楼主，解决了吗，我也被这个问题一直困扰

我也出现了这个问题，不知道LZ后来解决了吗？

http://unix.stackexchange.com/questions/250249/error-after-installing-dnf-on-centos-7
I am not sure why this is, but it looks like the epel-release repository (from where you install dnf) is not compatible with dnf itself. After installing dnf, first remove this using yum:
yum remove epel-release
and after that:
dnf repolistdnf list installed
etc. worked (at least on my CentOS 7 system).
应该是yum的epel和 dnf的冲突了 没办法缓存