CentOS Stream 换源以及 [Couldn't open file etcpkirpm-gpgRPM-GPG-KEY-centosofficial] 解决方案

一、换源教程

1、镜像文件位置

CentOS Stream 9 后默认启用了包管理工具 dnf，其是 yum 包管理工具的替代品。所以 dnf 和 yum 都使用 /etc/yum.repos.d/ 进行镜像配置。

CentOS Stream 9 后源的配置信息被整合入 /etc/yum.repos.d/ 下的两个文件 centos.repo 和 centos-addons.repo，所以换源仅需要对这两个文件中的内容进行替换😎👆。

cd /etc/yum.repos.d/ ：进入镜像配置目录

2、镜像源选择

企业源的话博主一般就用的腾讯源或者阿里源，毕竟这两家本身就是搞云服务器的，他们 Linux 服务器镜像都是自动换源过的，给自家用户用的速度一般不会差的🤔。

然后就是高校源，高校源一般都是用的清华大学的，由于他整个镜像站也是开源的，所以收录的镜像会多一些，都是速度和企业源都是差不多的（毕竟是华为提供的服务器支持）🥰。

这里用腾讯源和清华源示范。

3、更换镜像

在更换镜像前请先自行将原镜像文件备份，这里也给出原镜像文件便于更换失败后回滚：

centos.repo：

[baseos]
name=CentOS Stream $releasever - BaseOS
metalink=https://mirrors.centos.org/metalink?repo=centos-baseos-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[baseos-debuginfo]
name=CentOS Stream $releasever - BaseOS - Debug
metalink=https://mirrors.centos.org/metalink?repo=centos-baseos-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[baseos-source]
name=CentOS Stream $releasever - BaseOS - Source
metalink=https://mirrors.centos.org/metalink?repo=centos-baseos-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[appstream]
name=CentOS Stream $releasever - AppStream
metalink=https://mirrors.centos.org/metalink?repo=centos-appstream-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[appstream-debuginfo]
name=CentOS Stream $releasever - AppStream - Debug
metalink=https://mirrors.centos.org/metalink?repo=centos-appstream-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[appstream-source]
name=CentOS Stream $releasever - AppStream - Source
metalink=https://mirrors.centos.org/metalink?repo=centos-appstream-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[crb]
name=CentOS Stream $releasever - CRB
metalink=https://mirrors.centos.org/metalink?repo=centos-crb-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[crb-debuginfo]
name=CentOS Stream $releasever - CRB - Debug
metalink=https://mirrors.centos.org/metalink?repo=centos-crb-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[crb-source]
name=CentOS Stream $releasever - CRB - Source
metalink=https://mirrors.centos.org/metalink?repo=centos-crb-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

centos-addons.repo：

[highavailability]
name=CentOS Stream $releasever - HighAvailability
metalink=https://mirrors.centos.org/metalink?repo=centos-highavailability-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[highavailability-debuginfo]
name=CentOS Stream $releasever - HighAvailability - Debug
metalink=https://mirrors.centos.org/metalink?repo=centos-highavailability-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[highavailability-source]
name=CentOS Stream $releasever - HighAvailability - Source
metalink=https://mirrors.centos.org/metalink?repo=centos-highavailability-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[nfv]
name=CentOS Stream $releasever - NFV
metalink=https://mirrors.centos.org/metalink?repo=centos-nfv-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[nfv-debuginfo]
name=CentOS Stream $releasever - NFV - Debug
metalink=https://mirrors.centos.org/metalink?repo=centos-nfv-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[nfv-source]
name=CentOS Stream $releasever - NFV - Source
metalink=https://mirrors.centos.org/metalink?repo=centos-nfv-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[rt]
name=CentOS Stream $releasever - RT
metalink=https://mirrors.centos.org/metalink?repo=centos-rt-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[rt-debuginfo]
name=CentOS Stream $releasever - RT - Debug
metalink=https://mirrors.centos.org/metalink?repo=centos-rt-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[rt-source]
name=CentOS Stream $releasever - RT - Source
metalink=https://mirrors.centos.org/metalink?repo=centos-rt-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[resilientstorage]
name=CentOS Stream $releasever - ResilientStorage
metalink=https://mirrors.centos.org/metalink?repo=centos-resilientstorage-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[resilientstorage-debuginfo]
name=CentOS Stream $releasever - ResilientStorage - Debug
metalink=https://mirrors.centos.org/metalink?repo=centos-resilientstorage-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[resilientstorage-source]
name=CentOS Stream $releasever - ResilientStorage - Source
metalink=https://mirrors.centos.org/metalink?repo=centos-resilientstorage-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial-SHA256
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[extras-common]
name=CentOS Stream $releasever - Extras packages
metalink=https://mirrors.centos.org/metalink?repo=centos-extras-sig-extras-common-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Extras-SHA512
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[extras-common-source]
name=CentOS Stream $releasever - Extras packages - Source
metalink=https://mirrors.centos.org/metalink?repo=centos-extras-sig-extras-common-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Extras-SHA512
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

更换腾讯源：进入腾讯软件源官网，找到 centos-stream，点击查看，将 centos.repo 和 centos-addons.repo 更换为页面中给出的内容。

这里也给出腾讯云镜像文件，便于直接更换：

centos.repo：

[baseos]
name=CentOS Stream $releasever - BaseOS
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/BaseOS/$basearch/os
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[baseos-debuginfo]
name=CentOS Stream $releasever - BaseOS - Debug
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/BaseOS/$basearch/debug/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[baseos-source]
name=CentOS Stream $releasever - BaseOS - Source
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/BaseOS/source/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[appstream]
name=CentOS Stream $releasever - AppStream
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/AppStream/$basearch/os
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[appstream-debuginfo]
name=CentOS Stream $releasever - AppStream - Debug
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/AppStream/$basearch/debug/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[appstream-source]
name=CentOS Stream $releasever - AppStream - Source
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/AppStream/source/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[crb]
name=CentOS Stream $releasever - CRB
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/CRB/$basearch/os
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[crb-debuginfo]
name=CentOS Stream $releasever - CRB - Debug
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/CRB/$basearch/debug/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[crb-source]
name=CentOS Stream $releasever - CRB - Source
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/CRB/source/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

centos-addons.repo

[highavailability]
name=CentOS Stream $releasever - HighAvailability
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/HighAvailability/$basearch/os
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[highavailability-debuginfo]
name=CentOS Stream $releasever - HighAvailability - Debug
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/HighAvailability/$basearch/debug/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[highavailability-source]
name=CentOS Stream $releasever - HighAvailability - Source
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/HighAvailability/source/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[nfv]
name=CentOS Stream $releasever - NFV
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/NFV/$basearch/os
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[nfv-debuginfo]
name=CentOS Stream $releasever - NFV - Debug
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/NFV/$basearch/debug/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[nfv-source]
name=CentOS Stream $releasever - NFV - Source
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/NFV/source/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[rt]
name=CentOS Stream $releasever - RT
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/RT/$basearch/os
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[rt-debuginfo]
name=CentOS Stream $releasever - RT - Debug
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/RT/$basearch/debug/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[rt-source]
name=CentOS Stream $releasever - RT - Source
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/RT/source/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[resilientstorage]
name=CentOS Stream $releasever - ResilientStorage
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/ResilientStorage/$basearch/os
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[resilientstorage-debuginfo]
name=CentOS Stream $releasever - ResilientStorage - Debug
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/ResilientStorage/$basearch/debug/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[resilientstorage-source]
name=CentOS Stream $releasever - ResilientStorage - Source
baseurl=https://mirrors.tencent.com/centos-stream/$releasever-stream/ResilientStorage/source/tree/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[extras-common]
name=CentOS Stream $releasever - Extras packages
baseurl=https://mirrors.tencent.com/centos-stream/SIGs/$releasever-stream/extras/$basearch/extras-common
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Extras-SHA512
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[extras-common-source]
name=CentOS Stream $releasever - Extras packages - Source
baseurl=https://mirrors.tencent.com/centos-stream/SIGs/$releasever-stream/extras/source/extras-common
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Extras-SHA512
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

更换清华源：进入清华大学开源软件镜像站 | Tsinghua Open Source Mirror官网，找到 centos-stream，点击 "?"，将 centos.repo 和 centos-addons.repo 更换为页面中给出的内容（内容在下面，上面的是自动替换脚本）。

这里也给出腾讯云镜像文件，便于直接更换：

centos.repo：

[baseos]
name=CentOS Stream $releasever - BaseOS
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/BaseOS/$basearch/os
# metalink=https://mirrors.centos.org/metalink?repo=centos-baseos-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[baseos-debuginfo]
name=CentOS Stream $releasever - BaseOS - Debug
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/BaseOS/$basearch/debug/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-baseos-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[baseos-source]
name=CentOS Stream $releasever - BaseOS - Source
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/BaseOS/source/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-baseos-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[appstream]
name=CentOS Stream $releasever - AppStream
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/AppStream/$basearch/os
# metalink=https://mirrors.centos.org/metalink?repo=centos-appstream-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[appstream-debuginfo]
name=CentOS Stream $releasever - AppStream - Debug
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/AppStream/$basearch/debug/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-appstream-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[appstream-source]
name=CentOS Stream $releasever - AppStream - Source
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/AppStream/source/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-appstream-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[crb]
name=CentOS Stream $releasever - CRB
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/CRB/$basearch/os
# metalink=https://mirrors.centos.org/metalink?repo=centos-crb-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[crb-debuginfo]
name=CentOS Stream $releasever - CRB - Debug
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/CRB/$basearch/debug/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-crb-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[crb-source]
name=CentOS Stream $releasever - CRB - Source
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/CRB/source/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-crb-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

centos-addons.repo：

[highavailability]
name=CentOS Stream $releasever - HighAvailability
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/HighAvailability/$basearch/os
# metalink=https://mirrors.centos.org/metalink?repo=centos-highavailability-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[highavailability-debuginfo]
name=CentOS Stream $releasever - HighAvailability - Debug
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/HighAvailability/$basearch/debug/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-highavailability-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[highavailability-source]
name=CentOS Stream $releasever - HighAvailability - Source
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/HighAvailability/source/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-highavailability-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[nfv]
name=CentOS Stream $releasever - NFV
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/NFV/$basearch/os
# metalink=https://mirrors.centos.org/metalink?repo=centos-nfv-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[nfv-debuginfo]
name=CentOS Stream $releasever - NFV - Debug
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/NFV/$basearch/debug/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-nfv-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[nfv-source]
name=CentOS Stream $releasever - NFV - Source
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/NFV/source/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-nfv-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[rt]
name=CentOS Stream $releasever - RT
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/RT/$basearch/os
# metalink=https://mirrors.centos.org/metalink?repo=centos-rt-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[rt-debuginfo]
name=CentOS Stream $releasever - RT - Debug
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/RT/$basearch/debug/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-rt-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[rt-source]
name=CentOS Stream $releasever - RT - Source
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/RT/source/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-rt-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[resilientstorage]
name=CentOS Stream $releasever - ResilientStorage
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/ResilientStorage/$basearch/os
# metalink=https://mirrors.centos.org/metalink?repo=centos-resilientstorage-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=0

[resilientstorage-debuginfo]
name=CentOS Stream $releasever - ResilientStorage - Debug
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/ResilientStorage/$basearch/debug/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-resilientstorage-debug-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[resilientstorage-source]
name=CentOS Stream $releasever - ResilientStorage - Source
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/$releasever-stream/ResilientStorage/source/tree/
# metalink=https://mirrors.centos.org/metalink?repo=centos-resilientstorage-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

[extras-common]
name=CentOS Stream $releasever - Extras packages
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/SIGs/$releasever-stream/extras/$basearch/extras-common
# metalink=https://mirrors.centos.org/metalink?repo=centos-extras-sig-extras-common-$stream&arch=$basearch&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Extras-SHA512
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

[extras-common-source]
name=CentOS Stream $releasever - Extras packages - Source
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-stream/SIGs/$releasever-stream/extras/source/extras-common
# metalink=https://mirrors.centos.org/metalink?repo=centos-extras-sig-extras-common-source-$stream&arch=source&protocol=https,http
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Extras-SHA512
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
enabled=0

4、刷新

dnf clean all ：清理缓存

dnf makecache ：缓存

二、解决换源后安装软件包时报错 [Couldn't open file etcpkirpm-gpgRPM-GPG-KEY-centosofficial]

1、报错 [Couldn't open file etcpkirpm-gpgRPM-GPG-KEY-centosofficial]

当博主换源后想使用 dnf install vim 时，终端却报了如下错误：

Curl error (37): Could not read a file:// file for file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial [Couldn't open file /etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial]
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.

可以看出这段错误的意思是无法打开读取 /etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial 这样的一个文件，在博主查找后发现这个文件是一个密钥，用于检查下载的软件包经过 CentOS 官方验证。这是 CentOS 官网对于 GPG 密钥的解释CentOS GPG Keys - The CentOS Project，但为什么这个密钥会缺失呢？

进入 /etc/pki/rpm-gpg/ 目录可以发现有两个 GPG 密钥文件但是缺少报错中的 RPM-GPG-KEY-centosofficial ，但有一个文件名为 RPM-GPG-KEY-centosofficial-SHA256 和 RPM-GPG-KEY-centosofficial 十分相似，只是多了 SHA256 这一后缀，经过查询后发现这个后缀的含义只是一种算法的名称，所以将后缀取得后就能解决报错了。所以出现报错的原因就在于官方配置中的密钥项加上了该密钥使用的加密算法名称的后缀，而第三方源的却没有😫......