Centos 8 替换镜像源_centos8换源

1. 替换

1.1 备份

mkdir /etc/yum.repos.d.bak
mv /etc/yum.repos.d/* /etc/yum.repos.d.bak/
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1.2 下载

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
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1.3 更新

# 删除"mirrors.cloud.aliyuncs.com" 及 "mirrors.aliyuncs.com" 字符串所在的行
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

# 替换 "releasever/" 为 "releasever-stream/"
sed -i 's/releasever\//releasever-stream\//g' /etc/yum.repos.d/CentOS-Base.repo
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1.4 安装 elep

dnf -y install epel-release
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替换为阿里源：

cp /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup
cp /etc/yum.repos.d/epel-testing.repo /etc/yum.repos.d/epel-testing.repo.backup
sed -i 's|^#baseurl=https://download.fedoraproject.org/pub|baseurl=https://mirrors.aliyun.com|' /etc/yum.repos.d/epel*
sed -i 's|^metalink|#metalink|' /etc/yum.repos.d/epel*
yum clean all
yum makecache
yum -y update
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遇到问题

Q：安装包时报错：.rpm: signature 头部数据：不当，字节(61896)的号码超出范围

A：这是因为 yum 版本不匹配问题，需要首先更新 yum .执行下面操作:

yum upgrade rpm
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