Today while trying to run yum update for one of our server we got the following error.

yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons:
* atomic:
* base:
* extras:
* updates: [Errno 14] HTTP Error 404: Not Found


To fix this we logged into the server and from /etc/yum.repos.d/ delete the plesk.repo and run the yum updater again.  Please make sure if you are primarly using atomic corps repo.