I am using Fedora 20 and trying to install several software packages. e.g. sudo yum install python-matplotlibAnd get this response for every package I try:Loaded plugins: langpacks, refresh-packagekitadobe-linux-i386                                         |  951 B  00:00     epel/i386/metalink                                       |  38 kB  00:00     Could not parse metalink https://mirrors.fedoraproject.org/metalink repo=epel-7&arch=i386 error was No repomd fileOne of the configured repositories failed (Unknown), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work fix this:     1. Contact the upstream for the repository and get them to fix the problem.     2. Reconfigure the baseurl/etc. for the repository, to point to a working        upstream. This is most often useful if you are using a newer        distribution release than is supported by the repository (and the        packages for the previous distribution release still work).     3. Disable the repository, so yum won't use it by default. Yum will then        just ignore the repository until you permanently enable it again or use        --enablerepo for temporary usage:            yum-config-manager --disable <repoid>     4. Configure the failing repository to be skipped, if it is unavailable.        Note that yum will try to contact the repo. when it runs most commands,        so will have to try and fail each time (and thus. yum will be be much        slower). If it is a very temporary problem though, this is often a nice        compromise:            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=trueFile /var/cache/yum/i386/20/epel/metalink.xml does not existI don't understand the suggestions enough to confidently attempt them.I have searched the Internet for a solution and have tried this ...sudo yum clean allsudo yum update -y... which had no effect on the problem.and this ...[Harry@localhost]~% cat /etc/fedora-releaseFedora release 20 (Heisenbug)[Harry@localhost]~% sudo yum distro-sync --releasever=20... which gave the same no repomd file errorPlease can anyone help me to resolve this problem?
How do I resolve this yum problem: no repomd file
yum;repository;failure
Fedora 20 is considered old, unsupported.  According to the Fedora wiki, that applies also to Fedora 21.The timeline is explained in another part of the wiki:The Fedora Project releases a new version of Fedora approximately every 6 months and provides updated packages (maintenance) to these releases for approximately 13 months. This allows users to skip a release while still being able to always have a system that is still receiving updates. Fedora 20 was released in late 2013; this is mid-2016.  If you want updates, you'll have to upgrade the system.