CentOS8更新yum源

一、CentOS更新yum源

1、備份原有yum源文件

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak  

2、下載新的yum源文件

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo  

3、更新緩存

yum clean all  
yum makecache  

二、CentOS8配置yum源

1、查看CentOS8的yum源配置文件

cd /etc/yum.repos.d/  
ls  

2、編輯CentOS8的yum源配置文件

vi /etc/yum.repos.d/Centos-AppStream.repo  

3、修改baseurl為阿里雲地址

[appstream]  
name=CentOS-$releasever - AppStream  
baseurl=http://mirrors.aliyun.com/centos/$releasever/AppStream/$basearch/os/  
enabled=1  
gpgcheck=0  

4、修改對應的yum源文件即可

三、CentOS7更新yum源

1、備份原有yum源文件

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak  

2、下載新的yum源文件

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo  

3、更新緩存

yum clean all  
yum makecache  

四、CentOS8更換yum源

1、備份原有yum源文件

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak  

2、下載新的yum源文件

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo  

3、更新緩存

yum clean all  
yum makecache  

五、CentOS8本地yum源

1、安裝createrepo工具

yum install createrepo -y  

2、創建本地yum源目錄

mkdir /company/yum  

3、拷貝本地的yum源文件到公司yum目錄下

4、將rpm包加入yum庫,創建repodata文件,生成yum索引（以添加`bash-4.2.46-31.el7.x86_64.rpm` rpm包為例）

rpm --addsign /company/yum/bash-4.2.46-31.el7.x86_64.rpm
createrepo /company/yum/
yum clean all
yum makecache

六、CentOS8手動配置yum源

1、創建CentOS8的yum源配置文件

touch /etc/yum.repos.d/Centos-AppStream.repo  

2、編輯CentOS8的yum源配置文件

vi /etc/yum.repos.d/Centos-AppStream.repo  

3、輸入以下內容

[appstream]  
name=CentOS-$releasever - AppStream  
baseurl=http://mirrors.aliyun.com/centos/$releasever/AppStream/$basearch/os/  
enabled=1  
gpgcheck=0  

七、CentOS8安裝yum

1、檢查系統內是否有CentOS系統自帶的yum

rpm -qa|grep yum  

2、安裝yum

rpm -iUvh http://mirror.centos.org/centos/8/BaseOS/x86_64/os/Packages/yum-4.0.9.3-6.el8.noarch.rpm  

3、再檢查是否安裝成功

rpm -qa|grep yum  

八、CentOS8阿里雲yum源

1、備份原有yum源文件

cd /etc/yum.repos.d/  
mv CentOS-Base.repo CentOS-Base.repo.bak  

2、創建新的yum源文件

vi CentOS-Base.repo  

3、編輯新的yum源文件，複製以下內容：

[base]  
name=CentOS-$releasever - Base  
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os  
baseurl=http://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/  
gpgcheck=1  
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official  

[updates]  
name=CentOS-$releasever - Updates  
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates  
baseurl=http://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/  
gpgcheck=1  
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official  

[extras]  
name=CentOS-$releasever - Extras  
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras  
baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/os/  
gpgcheck=1  
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official  

[centosplus]  
name=CentOS-$releasever - Plus  
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus  
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/os/  
gpgcheck=1  
enabled=0  
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official  

4、更新緩存

yum clean all  
yum makecache  

九、CentOS8搭建本地yum源

詳細操作步驟參考第五小節「CentOS8本地yum源」。