CentOS9操作系统yum源配置文件主要有两个，分别是centos.repo和centos-addons.repo

centos.repo 配置文件是 CentOS 系统中用于配置 yum 软件仓库（repository）的文件。这个文件定义了 yum 从哪些 URL 地址获取软件包。
路径：/etc/yum.repos.d/centos.repo

centos-addons.repo 配置文件是 CentOS 系统中用于配置额外软件仓库（repository）的 yum 配置文件。这个文件允许用户添加除了基础仓库之外的额外软件包源，以便安装那些不在基础仓库中的软件包。
路径：/etc/yum.repos.d/centos-addons.repo

备份文件

# 备份 centos.repomv /etc/yum.repos.d/centos.repo /etc/yum.repos.d/centos.repo.backup

#备份 centos-addons.repomv /etc/yum.repos.d/centos-addons.repo /etc/yum.repos.d/centos-addons.repo.backup

修改yum源

新建/etc/yum.repos.d/centos.repo 文件和 /etc/yum.repos.d/centos-addons.repo文件

centos.repo文件内容

[baseos]

name=CentOS Stream $releasever - BaseOS

baseurl=https://mirrors.aliyun.com/centos-stream/$stream/BaseOS/$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-debug]

name=CentOS Stream $releasever - BaseOS - Debug

baseurl=https://mirrors.aliyun.com/centos-stream/$stream/BaseOS/$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.aliyun.com/centos-stream/$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.aliyun.com/centos-stream/$stream/AppStream/$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-debug]

name=CentOS Stream $releasever - AppStream - Debug

baseurl=https://mirrors.aliyun.com/centos-stream/$stream/AppStream/$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.aliyun.com/centos-stream/$stream/AppStream/$basearch/debug/tree/

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

gpgcheck=1

repo_gpgcheck=0

metadata_expire=6h

enabled=0

[crb]

name=CentOS Stream $releasever - CRB

baseurl=https://mirrors.aliyun.com/centos-stream/$stream/CRB/$basearch/os/

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

gpgcheck=1

repo_gpgcheck=0

metadata_expire=6h

countme=1

enabled=0

[crb-debug]

name=CentOS Stream $releasever - CRB - Debug

baseurl=https://mirrors.aliyun.com/centos-stream/$stream/CRB/$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.aliyun.com/centos-stream/$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文件内容

[highavailability]

name=CentOS Stream $releasever - HighAvailability

baseurl=http://mirrors.aliyun.com/centos-stream/$stream/HighAvailability/$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-debug]

name=CentOS Stream $releasever - HighAvailability - Debug

baseurl=http://mirrors.aliyun.com/centos-stream/$stream/HighAvailability/$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=http://mirrors.aliyun.com/centos-stream/$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=http://mirrors.aliyun.com/centos-stream/$stream/NFV/$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-debug]

name=CentOS Stream $releasever - NFV - Debug

baseurl=http://mirrors.aliyun.com/centos-stream/$stream/NFV/$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=http://mirrors.aliyun.com/centos-stream/$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=http://mirrors.aliyun.com/centos-stream/$stream/RT/$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-debug]

name=CentOS Stream $releasever - RT - Debug

baseurl=http://mirrors.aliyun.com/centos-stream/$stream/RT/$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=http://mirrors.aliyun.com/centos-stream/$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=http://mirrors.aliyun.com/centos-stream/$stream/ResilientStorage/$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-debug]

name=CentOS Stream $releasever - ResilientStorage - Debug

baseurl=http://mirrors.aliyun.com/centos-stream/$stream/ResilientStorage/$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=http://mirrors.aliyun.com/centos-stream/$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=http://mirrors.aliyun.com/centos-stream/SIGs/$stream/extras/$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=http://mirrors.aliyun.com/centos-stream/SIGs/$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

yum源生效

yum clean all
yum makecache
yum update