就是教你更换下载源，国内连接linux的默认下载源可能有些困难，下载速度缓慢甚至下载失败，可以尝试更换下载源（这个指的是包的源）

这期文章来自这期视频

Ubuntu换源（Debian系都可参考）

Plan A

cd到/etc/apt文件下

cd ./etc/apt

ls找到sources.list

ls

vim打开修改

vim ./sources.list

（如果你十分有把握的话可以直接在任意文件夹中指定路径vim打开编辑）

vim etc/apt/source.list

将里面的东西全选删除————先按冒号进入命令模式！！！

1,$d

在清华大学开源镜像站中勾选这些选项（记得看你的版本）

清华大学开源软件镜像站网址：https://mirror.tuna.tsinghua.edu.cn/help/ubuntu/

然后全部复制，粘贴到文档里面

强制保存并退出————先按冒号进入命令模式！！！

wq！

然后正常的来一遍apt升级就好了

sudo apt update
sudo apt upgrade

Plan B

在SFTP中，直接找到/etc/apt下的sources.list，双击用记事本打开

里面内容全部删除，然后把源信息复制进去（源信息的获取方式和上面相同）

保存退出，等sftp把文件上传上去

然后正常的升级一遍apt就好了

Tips：

• 除了vim编辑器你还有其他选择（比如nano）

• 每个Ubuntu的版本都有自己的版本代号，确认没搞错！

• 源有很多选择，这里用了清华源做示例，你开心你爱换啥换啥，国内源一堆堆（这里提供一些源给大家试试看）

• 阿里

  deb http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
  deb http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
  deb http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
  deb http://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
  deb http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse

  清华

  deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
  deb-src 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-src 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
  deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports 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
  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
  
  

  中科大

  deb https://mirrors.ustc.edu.cn/ubuntu/ jammy main restricted universe multiverse
  deb-src 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-src 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
  deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-backports 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
  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

  163

  deb http://mirrors.163.com/ubuntu/ jammy main restricted universe multiverse
  deb http://mirrors.163.com/ubuntu/ jammy-security main restricted universe multiverse
  deb http://mirrors.163.com/ubuntu/ jammy-updates main restricted universe multiverse
  deb http://mirrors.163.com/ubuntu/ jammy-proposed main restricted universe multiverse
  deb http://mirrors.163.com/ubuntu/ jammy-backports main restricted universe multiverse
  deb-src http://mirrors.163.com/ubuntu/ jammy main restricted universe multiverse
  deb-src http://mirrors.163.com/ubuntu/ jammy-security main restricted universe multiverse
  deb-src http://mirrors.163.com/ubuntu/ jammy-updates main restricted universe multiverse
  deb-src http://mirrors.163.com/ubuntu/ jammy-proposed main restricted universe multiverse
  deb-src http://mirrors.163.com/ubuntu/ jammy-backports main restricted universe multiverse

Cent OS换源

天啊简直比apt换源简单到不知道多少。。。

执行这个下载国内yum源的配置文件（这里还是清华源）

sudo wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.tuna.tsinghua.edu.cn/repo/Centos-7.repo

然后清理yum源缓存

sudo yum clean all
sudo yum makecache

然后应该就可以了，你可以尝试下点东西验证一下。。。。

P.S.这也太简单过头了吧。。。

依旧是两年前的文章，在爱发电上搬过来的，从未有人看过(╥╯﹏╰╥)ง