使用 Linux 服务器的站长们，明月一直以来都是建议要保持 Linux 的更新的，因为只有保持更新的 Linux 才称得上是安全的 Linux，否则长期不更新的 Linux 必然会存在安全漏洞的隐患，这很有可能造成你购买的云服务器成为他人的肉鸡、挖矿机等等，更严重的还会带来重要数据的丢失、被盗用。今天明月就针对五洛云服务器用户们整理汇总了主流Linux 发行版修改更新源的方法，以方便购买了五洛云境内/境外 Linux 服务器的更新和维护日常工作。
国内五洛云服务器强烈建议大家首次登录 Linux 后就修改为对应的国内更新源，境外包括港、澳、台、新、马、日、美欧的一般保留 Linux 默认更新源即可（不建议更改为国内更新源哦！），所以本文主要是以修改 Linux 更新源为国内源为主的，主要以Debian Linux、Ubuntu Linux、CentOS Linux 三个主流Linux 发行版为主：
1、修改Debian更新源
首先备份默认的更新源：
mv /etc/apt/sources.list /etc/apt/sources.list.old
下面注意了，都是直接可以复制粘贴到命令行后回车就执行的，放心 Linux 命令行支持多行命令执行的，并且明月都在五洛云服务器上实测有效的哦。
官方默认更新源
cat > /etc/apt/sources.list << EOF
deb https://deb.debian.org/debian/ bullseye main contrib non-free
deb-src https://deb.debian.org/debian/ bullseye main contrib non-free
deb https://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb-src https://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb https://deb.debian.org/debian/ bullseye-backports main contrib non-free
deb-src https://deb.debian.org/debian/ bullseye-backports main contrib non-free
deb https://deb.debian.org/debian-security/ bullseye-security main contrib non-free
deb-src https://deb.debian.org/debian-security/ bullseye-security main contrib non-free
EOF清华源
cat > /etc/apt/sources.list << EOF
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security/ bullseye-security main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security/ bullseye-security main contrib non-free
EOF中科大源
cat > /etc/apt/sources.list << EOF
deb https://mirrors.ustc.edu.cn/debian/ bullseye main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ bullseye main contrib non-free
deb https://mirrors.ustc.edu.cn/debian/ bullseye-updates main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ bullseye-updates main contrib non-free
deb https://mirrors.ustc.edu.cn/debian/ bullseye-backports main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ bullseye-backports main contrib non-free
deb https://mirrors.ustc.edu.cn/debian-security/ bullseye-security main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian-security/ bullseye-security main contrib non-free
EOF腾讯云源
cat > /etc/apt/sources.list << EOF
deb https://mirrors.cloud.tencent.com/debian/ bullseye main contrib non-free
deb-src https://mirrors.cloud.tencent.com/debian/ bullseye main contrib non-free
deb https://mirrors.cloud.tencent.com/debian/ bullseye-updates main contrib non-free
deb-src https://mirrors.cloud.tencent.com/debian/ bullseye-updates main contrib non-free
deb https://mirrors.cloud.tencent.com/debian/ bullseye-backports main contrib non-free
deb-src https://mirrors.cloud.tencent.com/debian/ bullseye-backports main contrib non-free
deb https://mirrors.cloud.tencent.com/debian-security/ bullseye-security main contrib non-free
deb-src https://mirrors.cloud.tencent.com/debian-security/ bullseye-security main contrib non-free
EOF附赠：如果是腾讯云服务器，可以选择腾讯云内网源，走内网不消耗公网流量，如下：
cat > /etc/apt/sources.list << EOF
deb http://mirrors.tencentyun.com/debian/ bullseye main contrib non-free
deb-src http://mirrors.tencentyun.com/debian/ bullseye main contrib non-free
deb http://mirrors.tencentyun.com/debian/ bullseye-updates main contrib non-free
deb-src http://mirrors.tencentyun.com/debian/ bullseye-updates main contrib non-free
deb http://mirrors.tencentyun.com/debian/ bullseye-backports main contrib non-free
deb-src http://mirrors.tencentyun.com/debian/ bullseye-backports main contrib non-free
deb http://mirrors.tencentyun.com/debian-security/ bullseye-security main contrib non-free
deb-src http://mirrors.tencentyun.com/debian-security/ bullseye-security main contrib non-free
EOF阿里云源
cat > /etc/apt/sources.list << EOF
deb https://mirrors.aliyun.com/debian/ bullseye main contrib non-free
deb-src https://mirrors.aliyun.com/debian/ bullseye main contrib non-free
deb https://mirrors.aliyun.com/debian/ bullseye-updates main contrib non-free
deb-src https://mirrors.aliyun.com/debian/ bullseye-updates main contrib non-free
deb https://mirrors.aliyun.com/debian/ bullseye-backports main contrib non-free
deb-src https://mirrors.aliyun.com/debian/ bullseye-backports main contrib non-free
deb https://mirrors.aliyun.com/debian-security/ bullseye-security main contrib non-free
deb-src https://mirrors.aliyun.com/debian-security/ bullseye-security main contrib non-free
EOF附赠是阿里云服务器时，可以选择阿里云内网源，走内网不消耗公网流量，如下：
cat > /etc/apt/sources.list << EOF
deb http://mirrors.cloud.aliyuncs.com/debian/ bullseye main contrib non-free
deb-src http://mirrors.cloud.aliyuncs.com/debian/ bullseye main contrib non-free
deb http://mirrors.cloud.aliyuncs.com/debian/ bullseye-updates main contrib non-free
deb-src http://mirrors.cloud.aliyuncs.com/debian/ bullseye-updates main contrib non-free
deb http://mirrors.cloud.aliyuncs.com/debian/ bullseye-backports main contrib non-free
deb-src http://mirrors.cloud.aliyuncs.com/debian/ bullseye-backports main contrib non-free
deb http://mirrors.cloud.aliyuncs.com/debian-security/ bullseye-security main contrib non-free
deb-src http://mirrors.cloud.aliyuncs.com/debian-security/ bullseye-security main contrib non-free
EOF最后更新 apt 索引
apt update
2、修改Ubuntu更新源
首先备份默认的更新源：
mv /etc/apt/sources.list /etc/apt/sources.list.old
官方默认更新源
cat > /etc/apt/sources.list << EOF
deb http://archive.ubuntu.com/ubuntu/ jammy main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jammy-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jammy-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# 预览版软件源，不建议启用，保留注释为宜
# deb http://archive.ubuntu.com/ubuntu/ jammy-proposed main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ jammy-proposed main restricted universe multiverse
EOF腾讯云内网源（仅限腾讯云服务器哦）
cat > /etc/apt/sources.list << EOF
deb http://mirrors.tencentyun.com/ubuntu/ jammy main restricted universe multiverse
deb http://mirrors.tencentyun.com/ubuntu/ jammy-updates main restricted universe multiverse
deb http://mirrors.tencentyun.com/ubuntu/ jammy-backports main restricted universe multiverse
# 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换
deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb http://mirrors.tencentyun.com/ubuntu/ jammy-security main restricted universe multiverse
# # deb-src http://mirrors.tencentyun.com/ubuntu/ jammy-security main restricted universe multiverse
# 预览版软件源，不建议启用，保持注释为宜
# deb http://mirrors.tencentyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
# deb-src http://mirrors.tencentyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
EOF清华源
cat > /etc/apt/sources.list << EOF
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
# 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换
deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# 预览版软件源，不建议启用，保持注释为宜
# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
EOF中科大源
cat > /etc/apt/sources.list << EOF
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
# 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换
deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# # deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# 预览版软件源，不建议启用，保持注释为宜
# deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
EOF阿里云源
cat > /etc/apt/sources.list << EOF
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
# 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换
deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# # deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# 预览版软件源，不建议启用保持注释为宜
# deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
EOF最后更新 apt 索引
apt update
3、修改 CentOS 更新源
因为 CentOS 已经停止了维护更新，所以明月这里是建议大家及时更换到 Debian Linux 发行版的，考虑到宝塔面板目前在 CentOS7 下最稳定，所以就给大家贴出 CentOS7修改更新源的方法，其他版本的过于杂乱，就不推荐给大家了。
备份现有的默认 yum 源
cd /etc/yum.repos.d/
rename repo repo.old CentOS-*.repo
CentOS7 官方源
rpm -Uvh --force http://mirror.centos.org/centos-7/7.9.2009/os/x86_64/Packages/centos-release-7-9.2009.0.el7.centos.x86_64.rpm
腾讯云源
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.rep
执行以下命令替换为腾讯云内网源
sed -i 's+mirrors.cloud.tencent.com+mirrors.tencentyun.com+' /etc/yum.repos.d/CentOS-Base.repo
最后更新 yum 索引
yum update
CentOS 目前国内源比较混乱，明月实测下来感觉腾讯云的 yum 源相对靠谱一些，其他的总是会有各种问题造成 yum 更新会报错的，还是建议大家及早的更换为 Debian Linux 最佳了！
修改 Linux 发行版的更新源一个好习惯就是现备份好原有的更新源，另外就是一定要根据自己服务器是境内还是境外来选择性的修改，否则会造成 Linux 更新失败、卡顿、报错，严重还会影响到宝塔面板、LNMP 的一键安装的哦，切记切记了！