安装：
CentOS8通过引导盘+网络镜像镜像源安装系统，设置网络镜像安装源为：
https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/
更换更新源：
cd /etc/yum.repos.d/
CentOS 7
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo 或者 curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
CentOS 8
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo 或者 curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo
更换安装源
cd /etc mv yum.repos.d yum.repos.d.bak mkdir yum.repos.d wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo yum clean all yum makecache
Debian
阿里：https://developer.aliyun.com/mirror/debian?spm=a2c6h.13651102.0.0.3e221b11KlIzik
debian 11.x (bullseye)
编辑/etc/apt/sources.list文件(需要使用sudo), 在文件最前面添加以下条目(操作前请做好相应备份)
deb http://mirrors.cloud.aliyuncs.com/debian/ bullseye main non-free contrib deb-src http://mirrors.cloud.aliyuncs.com/debian/ bullseye main non-free contrib deb http://mirrors.cloud.aliyuncs.com/debian-security bullseye/updates main deb-src http://mirrors.cloud.aliyuncs.com/debian-security bullseye/updates main deb http://mirrors.cloud.aliyuncs.com/debian/ bullseye-updates main non-free contrib deb-src http://mirrors.cloud.aliyuncs.com/debian/ bullseye-updates main non-free contrib deb http://mirrors.cloud.aliyuncs.com/debian/ bullseye-backports main non-free contrib deb-src http://mirrors.cloud.aliyuncs.com/debian/ bullseye-backports main non-free contrib
网易：
deb http://mirrors.163.com/debian/ stretch main non-free contrib deb http://mirrors.163.com/debian/ stretch-updates main non-free contrib deb http://mirrors.163.com/debian/ stretch-backports main non-free contrib deb-src http://mirrors.163.com/debian/ stretch main non-free contrib deb-src http://mirrors.163.com/debian/ stretch-updates main non-free contrib deb-src http://mirrors.163.com/debian/ stretch-backports main non-free contrib deb http://mirrors.163.com/debian-security/ stretch/updates main non-free contrib deb-src http://mirrors.163.com/debian-security/ stretch/updates main non-free contrib
Debian10
安装了Debian10，但是想安装宝塔面板和transmission都出错，主要是因为apt源的问题，
更换apt源
nano /etc/apt/sources.list
用#注释掉原来的
加入一下记录
deb https://mirrors.aliyun.com/debian stable main contrib non-free deb https://mirrors.aliyun.com/debian stable-updates main contrib non-free
保存，然后 apt-get update 进行更新
官方/镜像源下载
解决步骤：
去mirrors.163.com
找到debian，去右边help，下载源配置文件
放到/etc/apt/source.list
apt update 更新源
常用软件在源里安装就行了
其它：
http://www.savh.cn/thread-1422.htm
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