Pop!_OS 22.04安装Docker时出现apt源404错误求助

我的系统信息（lsb_release -a输出）：

Distributor ID: Pop
Description:    Pop!_OS 22.04 LTS
Release:    22.04
Codename:   jammy

我误按照Debian的Docker安装教程操作，执行sudo apt-get update时出现以下错误：

>sudo apt-get update
Ign:1 https://download.docker.com/linux/debian jammy InRelease
Hit:2 http://apt.pop-os.org/proprietary jammy InRelease
Hit:3 http://apt.pop-os.org/release jammy InRelease
Err:4 https://download.docker.com/linux/debian jammy Release
  404  Not Found [IP: 18.67.240.19 443]
Hit:5 http://apt.pop-os.org/ubuntu jammy InRelease
Hit:6 http://apt.pop-os.org/ubuntu jammy-security InRelease
Hit:7 http://apt.pop-os.org/ubuntu jammy-updates InRelease
Hit:8 http://apt.pop-os.org/ubuntu jammy-backports InRelease
Reading package lists... Done
E: The repository 'https://download.docker.com/linux/debian jammy Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

我的/etc/apt/sources.list文件内容如下（仅注释，无有效源）：

## See sources.list(5) for more information, especialy
# Remember that you can only use http, ftp or file URIs
# CDROMs are managed through the apt-cdrom tool.
# deb cdrom:[Pop_OS 22.04 _Jammy Jellyfish_ - Release amd64 (20221026)]/ jammy main restricted
# deb cdrom:[Pop_OS 22.04 _Jammy Jellyfish_ - Release amd64 (20221026)]/ stable main restricted
# deb cdrom:[Pop_OS 22.04 _Jammy Jellyfish_ - Release amd64 (20221026)]/ unstable main restricted

我曾尝试添加[trusted=yes] https://download.docker.com/linux/debian，但问题依旧。

核心问题 #

你用了Debian的Docker源，但Pop!_OS 22.04基于Ubuntu Jammy，Debian源里没有jammy版本的Release文件，所以报404错误。

修复步骤 #

1. 删除错误的Debian Docker源
   先找到添加的错误源文件，通常存放在/etc/apt/sources.list.d/目录下，文件名类似docker.list：

   sudo rm /etc/apt/sources.list.d/docker.list
   

   不确定文件名的话，可先列出目录内容确认：

   ls /etc/apt/sources.list.d/
   

2. 添加正确的Ubuntu Docker源
   执行以下命令添加适配Ubuntu Jammy的Docker官方源：

   # 导入Docker官方GPG密钥
   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/docker.gpg
   # 添加适配jammy的源
   echo "deb [arch=$(dpkg --print-architecture)] https://download.docker.com/linux/ubuntu jammy stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
   

3. 更新软件包列表并安装Docker

   sudo apt-get update
   sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
   

4. 验证安装结果
   运行hello-world容器测试Docker是否正常工作：

   sudo docker run hello-world
   

内容的提问来源于stack exchange，提问作者Serdar