常见 Linux 发行版本更换国内源

CentOS 7

# 备份原有源文件
cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.back
# 下载源文件
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo

# 生成缓存
yum makecache

yum install -y epel-release
cp /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.back
wget -O /etc/yum.repos.d/epel.repo http://mirrors.cloud.tencent.com/repo/epel-7.repo

yum makecache

CentOS 7 ARM

sed -e 's|^mirrorlist=|#mirrorlist=|g' \
         -e 's|^#baseurl=http://mirror.centos.org/altarch/|baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-altarch/|g' \
         -e 's|^#baseurl=http://mirror.centos.org/$contentdir/|baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-altarch/|g' \
         -i.bak \
         /etc/yum.repos.d/CentOS-*.repo
# 生成缓存
yum makecache

yum install -y epel-release
cp /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.back

sed -e 's!^metalink=!#metalink=!g' \
    -e 's!^#baseurl=!baseurl=!g' \
    -e 's!//download\.fedoraproject\.org/pub!//mirrors.tuna.tsinghua.edu.cn!g' \
    -e 's!//download\.example/pub!//mirrors.tuna.tsinghua.edu.cn!g' \
    -e 's!http://mirrors!https://mirrors!g' \
    -i /etc/yum.repos.d/epel*.repo

yum update

CentOS 8

rename '.repo' '.repo.bak' /etc/yum.repos.d/*.repo

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo

Ubuntu 20

# 备份源文件
cp /etc/apt/sources.list /etc/apt/sources.list.back

wget -O /etc/apt/sources.list http://mirrors.cloud.tencent.com/repo/ubuntu20_sources.list

# 更新源信息
apt update