所以我正在尝试设置一个 ssh 堡垒服务器，但我在设置 EPEL 以安装 Python3.6 时遇到问题。
我在用CentOS Linux release 7.4.1708 (Core)
所以我试图先使用
安装EPELsudo yum -y install epel-release（我之前当然做过sudo yum -y update并且效果很好），但它告诉我Package 'epel-release' not found
因此，我尝试了使用RedHat Package Manager的不同方法：
sudo rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
这成功安装了包，我可以看到两者epel.repo和（我epel-testing.repo在etc/yum.repos.d帖子末尾复制了它们的包含）
但是，现在，每当我尝试使用 yum 做某事时，无论是更新还是安装某些软件包，它都会给我以下错误（例如，我使用过yum -y install Python3.6或者我也尝试过安装tsclient或python-pip）：
[root@scw-39016b yum.repos.d]# yum install -y Python3.6
Loaded plugins: fastestmirror
base | 3.6 kB 00:00
centos-kernel | 2.9 kB 00:00
epel/armhfp/metalink | 42 kB 00:00
Could not parse metalink https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=armhfp error was
No repomd file
One 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. Run the command with the repository temporarily disabled
yum --disablerepo=<repoid> ...
4. Disable the repository permanently, 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>
or
subscription-manager repos --disable=<repoid>
5. 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=true
File /var/cache/yum/armhfp/7/epel/metalink.xml does not exist
我已经尝试了数百万种方法来解决这个问题，但似乎没有任何帮助:(
我重新安装了 5 次，我已经完成了sudo yum clean all，我也尝试在 repo 文件和其他方式中取消注释baseurl和评论metalink，等等......，但没有任何帮助:(
有人可以让我知道，请问是什么导致了这个错误？
我在某处读到它可能与启用/禁用某些存储库有关，但我不明白如何处理它..
非常感谢 ！！！
epel.repo
[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch
metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch/debug
metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1
[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
baseurl=http://download.fedoraproject.org/pub/epel/7/SRPMS
metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-source-7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1
epel-testing.repo
[epel-testing]
name=Extra Packages for Enterprise Linux 7 - Testing - $basearch
baseurl=http://download.fedoraproject.org/pub/epel/testing/7/$basearch
metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-epel7&arch=$basearch
failovermethod=priority
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
[epel-testing-debuginfo]
name=Extra Packages for Enterprise Linux 7 - Testing - $basearch - Debug
baseurl=http://download.fedoraproject.org/pub/epel/testing/7/$basearch/debug
metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-debug-epel7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1
[epel-testing-source]
name=Extra Packages for Enterprise Linux 7 - Testing - $basearch - Source
baseurl=http://download.fedoraproject.org/pub/epel/testing/7/SRPMS
metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-source-epel7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1
