#yum -y update Setting up Update Process Setting up repositories ftp.riken.jp/Linux/fedora/core/updates/4/i686/repodata/repomd.xml: [Errno 4] IOError: <urlopen error (-3, 'Temporary failure in name resolution')> Trying other mirror. Cannot open/read repmd.xml file for repository: updates-released failure: repodata/repomd.xml from updates-released: [errno 256] No more mirrors to try