虽然通过yum安装rpm时在AWS EC2实例中遇到以下错误。
sudo yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
epel/x86_64/metalink | 16 kB 00:00:00
* base: d36uatko69830t.cloudfront.net
* epel: dl.fedoraproject.org
* extras: d36uatko69830t.cloudfront.net
* updates: d36uatko69830t.cloudfront.net
base | 3.6 kB 00:00:00
epel | 5.4 kB 00:00:00
http://mirror.es.its.nyu.edu/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://dl.fedoraproject.org/pub/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://d2lzkl7pfhq30w.cloudfront.net/pub/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://mirror.umd.edu/fedora/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://mirror.vcu.edu/pub/gnu%2Blinux/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://mirror.math.princeton.edu/pub/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://ewr.edge.kernel.org/fedora-buffet/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://iad.mirror.rackspace.com/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://epel.mirror.constant.com/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://fedora-epel.mirrors.tds.net/fedora-epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://download-cc-rdu01.fedoraproject.org/pub/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://mirror.siena.edu/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://fedora.mirrors.pair.com/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://mirrors.mit.edu/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://mirror.metrocast.net/fedora/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://mirror.atl.genesisadaptive.com/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://download-ib01.fedoraproject.org/pub/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://reflector.westga.edu/repos/Fedora-EPEL/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for
epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://mirror.csis.ysu.edu/fedora/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://mirror.nodesdirect.com/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://mirror.pit.teraswitch.com/fedora/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml
does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
https://mirror.us-midwest-1.nexcess.net/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel | 5.4 kB 00:00:00
http://mirror.grid.uchicago.edu/pub/linux/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel
无法安装软件包rpm，它将尝试多个镜像并最终失败。这个问题是从昨天开始发生的，它在较早之前可以正常工作，不确定repomd.xml文件中做了什么更改。还有其他人面临同样的问题吗？
好像在CentOS软件包存储库中有问题。
作为解决方法，您可以手动下载epel-release软件包并使用以下命令进行安装；
wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
sudo yum install epel-release-latest-7.noarch.rpm
[这似乎是一个更广为人知的问题，与timestamp文件内部的repomd.xml属性与revision属性不同。
当前建议如下：
/etc/yum.repos.d/epel.repo文件。metalink属性。baseurl属性。执行此操作后，请运行yum clean metadata或yum clean all。
仅应在短期内完成，解决问题后即可恢复。