問題：
剛剛在本地安裝了CentOS7虛擬機，使用yum安裝vim軟件時（最小化安裝只有vi沒有vim）出現下面的報錯
原因 ：
CentOS7 已于2024-6-30停止維護，官方鏡像源已不可用，可以更換為阿里云鏡像源
解決：
mv? /etc/yum.repos.d/CentOS-Base.repo??/etc/yum.repos.d/CentOS-Base.repo.bak
vi?/etc/yum.repos.d/CentOS-Base.repo? ? ?# 添加以下內容
[base]
name=CentOS-7-Base-vault.aliyun.com
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
enabled=1[updates]
name=CentOS-7-Updates-vault.aliyun.com
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
enabled=1[extras]
name=CentOS-7-Extras-vault.aliyun.com
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
enabled=1
?# 清除舊緩存
sudo yum clean all
# 重建元數據緩存
sudo yum makecache
?# 驗證倉庫列表
sudo yum repolist
)
