在 CentOS 7 i386 上安裝實時核心

我有一台正在嘗試安裝實時核心的電腦。

我的作業系統：

# uname -a
Linux localhost.localdomain 3.10.0-1127.el7.centos.plus.i686 #1 SMP Sun Apr 5 18:08:31 UTC 2020 i686 i686 i386 GNU/Linux

我創建了/etc/yum.repos.d/CentOS-rt.repo具有以下內容的文件

# CentOS-rt.repo

[rt]
name=CentOS-7 - rt
baseurl=http://mirror.centos.org/centos/\$releasever/rt/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

當我嘗試更新軟體包時，我收到錯誤消息，請參見下文

# yum update -y
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirror1.hs-esslingen.de
* extras: mirror1.hs-esslingen.de
* updates: mirror1.hs-esslingen.de
base                                                                                                                                                                                        | 3.6 kB  00:00:00     
extras                                                                                                                                                                                      | 2.9 kB  00:00:00     
http://mirror.centos.org/centos/7/rt/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
Trying other mirror.
To address this issue please refer to the below wiki article 

https://wiki.centos.org/yum-errors

If above article doesn't help to resolve this issue please use https://bugs.centos.org/.



One of the configured repositories failed (CentOS-7 - rt),
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=rt ...

    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 rt
       or
           subscription-manager repos --disable=rt

    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=rt.skip_if_unavailable=true

failure: repodata/repomd.xml from rt: [Errno 256] No more mirrors to try.
http://mirror.centos.org/centos/7/rt/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found

我以前從未安裝過核心。

請幫我繞過上述錯誤。

謝謝你。

似乎實時核心僅在 AMD64/x86_64 架構上可用——你的是 i386（32 位）。可以從瀏覽器訪問回購 URL，因此如果您在 Cern 上打開CentOS 7 實時核心或Centos 實時核心，您將只能看到 64 位支持。Red Hat 的實時核心安裝指南第 9 頁也證實了這一點，僅支持 64 位。儘管 RHEL 7 是僅支持 32 位庫的 64 位發行版，所以也就不足為奇了。但是我建議您閱讀 Red Hat 的文件，它會幫助您了解實時核心的好處以及您是否真的需要它。

引用自：https://unix.stackexchange.com/questions/604673