【笔记】apt源设置为阿里云源

1. 备份现有的源列表（可选，但推荐）：

sudo mv /etc/apt/sources.list /etc/apt/sources.list.bak

2. 编辑 sources.list 文件：

使用以下命令打开 sources.list 文件：

sudo nano /etc/apt/sources.list

3. 替换内容为阿里源：

根据你使用的 Ubuntu 版本，将内容替换为对应的阿里源。以下是常见版本的源地址：

• Ubuntu 22.04 (Jammy):

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

• Ubuntu 20.04 (Focal):

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

• Ubuntu 18.04 (Bionic):

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

4. 保存并退出：

编辑完成后，按 Ctrl + O 保存文件，然后按 Ctrl + X 退出编辑器。

5. 更新软件包索引：

使用以下命令更新软件包索引：

sudo apt update

完成以上步骤后，APT 已经使用阿里云源进行软件包的更新和下载。