On 05/01/2018 11:26 AM, Marius Rometsch wrote:
> Hello dear SL Users,
> I was directed here from the scientificlinuxforum.org because I seem to have encountered unusual behavior of yum and SL.
> I switched from OpenSUSE to SL7 yesterday and while setting it up, yum could not install or update any packages.
> Whenever i try to install or update I get the following errors: https://pastebin.com/UqKyKANq
> TL;DR: I get back 404 for every repo
> I tried:
> Adding 3rd party repos
> Changing DNS configuration
> cleaning yum
>
> This is the Link to the original forum post I created with all terminal responeses:
> https://scientificlinuxforum.org/index.php?showtopic=3740
>
> Please ask me for whatever information you might need.
>
> Info:
> -Operating System: Scientific Linux 7.4 (Nitrogen)
> -CPE OS Name: cpe:/o:scientificlinux:scientificlinux:7.4:GA
> -Kernel: Linux 3.10.0-693.el7.x86_64
> -Architecture: x86-64
> Everything is freshly installed.
>   
> I am really out of options here. It would be great if someone could help me fiigure this out.
> Thank you in advance and best regards
> Marius Rometsch

The errors you posted to pastebin.com all seem to relate to the elrepo 
repository. Try "yum --disablerepo=elrepo update" and see if that works.

Also, the repomd.xml.asc files which are causing the 404 errors tend to 
be associated with the repo_gpgcheck option, which not all repos 
support. If you enabled that in your /etc/yum.conf file, try disabling 
it. (See https://access.redhat.com/solutions/2850911)

-- 
Gilles R. Detillieux              E-mail: <[log in to unmask]>
Spinal Cord Research Centre       WWW:    http://www.scrc.umanitoba.ca/
Dept. of Physiology and Pathophysiology, Rady Faculty of Health Sciences,
Univ. of Manitoba  Winnipeg, MB  R3E 0J9  (Canada)