CentOS 9 Stream

yum配置文件路径 

```
/etc/yum.repos.d/centos.repo
```


备份源配置

```
 mv /etc/yum.repos.d/centos.repo /etc/yum.repos.d/centos.repo.backup
```

阿里源配置

```
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#
 
[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
#failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos-stream/$stream/BaseOS/$basearch/os/
        http://mirrors.aliyuncs.com/centos-stream/$stream/BaseOS/$basearch/os/
        http://mirrors.cloud.aliyuncs.com/centos-stream/$stream/BaseOS/$basearch/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos-stream/RPM-GPG-KEY-CentOS-Official
 
#additional packages that may be useful
#[extras]
#name=CentOS-$releasever - Extras - mirrors.aliyun.com
#failovermethod=priority
#baseurl=https://mirrors.aliyun.com/centos-stream/$stream/extras/$basearch/os/
#        http://mirrors.aliyuncs.com/centos-stream/$stream/extras/$basearch/os/
#        http://mirrors.cloud.aliyuncs.com/centos-stream/$stream/extras/$basearch/os/
#gpgcheck=1
#gpgkey=https://mirrors.aliyun.com/centos-stream/RPM-GPG-KEY-CentOS-Official
 
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
#failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos-stream/$stream/centosplus/$basearch/os/
        http://mirrors.aliyuncs.com/centos-stream/$stream/centosplus/$basearch/os/
        http://mirrors.cloud.aliyuncs.com/centos-stream/$stream/centosplus/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=https://mirrors.aliyun.com/centos-stream/RPM-GPG-KEY-CentOS-Official
 
[PowerTools]
name=CentOS-$releasever - PowerTools - mirrors.aliyun.com
#failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos-stream/$stream/PowerTools/$basearch/os/
        http://mirrors.aliyuncs.com/centos-stream/$stream/PowerTools/$basearch/os/
        http://mirrors.cloud.aliyuncs.com/centos-stream/$stream/PowerTools/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=https://mirrors.aliyun.com/centos-stream/RPM-GPG-KEY-CentOS-Official
 
 
[AppStream]
name=CentOS-$releasever - AppStream - mirrors.aliyun.com
#failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos-stream/$stream/AppStream/$basearch/os/
        http://mirrors.aliyuncs.com/centos-stream/$stream/AppStream/$basearch/os/
        http://mirrors.cloud.aliyuncs.com/centos-stream/$stream/AppStream/$basearch/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos-stream/RPM-GPG-KEY-CentOS-Official
```

```
[baseos]
name=CentOS Stream $releasever - BaseOS
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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 $releasever - BaseOS - Debug
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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 $releasever - BaseOS - Source
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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 $releasever - AppStream
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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 $releasever - AppStream - Debug
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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 $releasever - AppStream - Source
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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 $releasever - CRB
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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 $releasever - CRB - Debug
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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 $releasever - CRB - Source
baseurl=https://mirrors.ustc.edu.cn/centos-stream/$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
```

更新缓存 

```
yum makecache && yum update
```