CentOS 7 i386にライブカーネルをインストールする

ライブカーネルをインストールしたいコンピュータがあります。

私のオペレーティングシステム：

# 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

/etc/yum.repos.d/CentOS-rt.repo次の内容でファイルを作成しました。

# 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

パッケージを更新しようとすると、エラーメッセージが表示されます。下記をご覧ください。

# 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

私は以前カーネルをインストールしたことがありません。

上記のエラーを回避するのに役立ちます。

ありがとうございます。