[root@wbob yum.repos.d]# dnf install http*
Failed to open: /var/cache/dnf/epel-2b6dfc5904c26562/repodata/3568db50aff54dff0b2fc7dedb21f1b24ea5618e9be32f5c6a0a9525f008bed7-updateinfo.xml.bz2.

我操，你这是什么命令

命令不对啊，你最起码要指明要安装个啥

clean 一下再试试

dnf clean all

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？

Fedora为什么会需要epel？

试试这两个命令：sudo dnf clean all
sudo dnf makecache

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