Look in the EPEL configuration file for yum, at
/etc/yum.repos.d/epel.repo. This is typically set to use a
"mirrorlist", a web link that reports the mirror sites nearest to you.
That upstream link has the broken listing: I'd reach out to the
maintainers of EPEL about the dead mirror site.

On Sat, Nov 23, 2013 at 11:10 AM, Mahmood Naderan <[log in to unmask]> wrote:
> Hi,
> For many days (I think more than a month), when I run yum search command, I
> get this error
>
> Loading mirror speeds from cached hostfile
> epel/metalink
> | 5.5 kB     00:00
>  * epel: ftp.cuhk.edu.hk
>  * sl: ftp.scientificlinux.org
>  * sl-security: ftp.scientificlinux.org
> epel
> | 4.2 kB     00:00
> http://ftp.cuhk.edu.hk/pub/linux/fedora-epel/6/x86_64/repodata/repomd.xml:
> [Errno -1] repomd.xml does not match metalink for epel
> Trying other mirror.
> epel
> | 3.9 kB     00:00
> epel/primary_db
> | 5.7 MB     01:35
> sl
> | 3.5 kB     00:00
> sl-livecd-extra
> | 1.4 kB     00:00
> sl-livecd-extra/primary
> |  29 kB     00:00
> sl-livecd-extra
> 100/100
> sl-security
> | 3.0 kB     00:00
>
> If that link is dead, How can i remove that?
>
> Regards,
> Mahmood