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如果我发现在互联网上解决了一个类似的问题，我就不会写了。我搜索了几乎所有的问答网站，并被困在与 4 小时前完全相同的位置。我完全按照在我的 Ubuntu 17.10 系统上安装 Docker CE 的文档进行操作。但是，当我尝试运行时sudo apt-get update，我的控制台上出现以下错误：

    Ign:1 http://ppa.launchpad.net/mc3man/xerus-media/ubuntu artful InRelease      
Get:2 http://security.ubuntu.com/ubuntu artful-security InRelease [78.6 kB]    
Hit:3 https://download.docker.com/linux/ubuntu artful InRelease                
Hit:4 http://in.archive.ubuntu.com/ubuntu artful InRelease                     
Err:5 http://ppa.launchpad.net/mc3man/xerus-media/ubuntu artful Release        
  404  Not Found
Get:6 http://in.archive.ubuntu.com/ubuntu artful-updates InRelease [78.6 kB]   
Get:7 http://in.archive.ubuntu.com/ubuntu artful-backports InRelease [72.2 kB]
Reading package lists... Done      
E: The repository 'http://ppa.launchpad.net/mc3man/xerus-media/ubuntu artful 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.

不用说，我不能继续使用 Docker。我该如何解决？PS，我尝试编辑我的 sources.list 文件，但它是只读的，我无法保存更改。另外，我注意到在http://ppa.launchpad.net/mc3man/xerus-media/ubuntu/，Release 文件位于 dist/Xenial 文件夹中。

请帮我解决这个问题。

编辑：这是我的 sources.list 文件以获取更多信息。

# deb cdrom:[Ubuntu 17.10 _Artful Aardvark_ - Release amd64 (20171018)]/ artful main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://in.archive.ubuntu.com/ubuntu/ artful main restricted
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://in.archive.ubuntu.com/ubuntu/ artful-updates main restricted
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ artful universe
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful universe
deb http://in.archive.ubuntu.com/ubuntu/ artful-updates universe
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://in.archive.ubuntu.com/ubuntu/ artful multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful multiverse
deb http://in.archive.ubuntu.com/ubuntu/ artful-updates multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ artful-backports main restricted universe multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu artful partner
# deb-src http://archive.canonical.com/ubuntu artful partner

deb http://security.ubuntu.com/ubuntu artful-security main restricted
# deb-src http://security.ubuntu.com/ubuntu artful-security main restricted
deb http://security.ubuntu.com/ubuntu artful-security universe
# deb-src http://security.ubuntu.com/ubuntu artful-security universe
deb http://security.ubuntu.com/ubuntu artful-security multiverse
# deb-src http://security.ubuntu.com/ubuntu artful-security multiverse
deb [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
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1 回答 1

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你有两个问题混为一谈，对于初学者来说，让我们在 xerus-media 上工作

cd /etc/apt
grep -r xerus *

现在编辑包含 xerus 的文件

sudo vi /etc/apt/either_sources.list_or_a_file_in_subdir

删除提到的行

http://ppa.launchpad.net/mc3man/xerus-media/ubuntu artful Release

添加这些行

deb http://ppa.launchpad.net/mc3man/xerus-media/ubuntu xenial main 
deb-src http://ppa.launchpad.net/mc3man/xerus-media/ubuntu xenial main

保存该文件并确认您不再看到提及 xerus-media 的错误

sudo apt-get update

现在讨论 docker 问题... ubuntu 的 docker 包已发送到 xenial ... 所以让我们看看您有什么... 执行此操作

cd /etc/apt
grep -r docker *

现在编辑提到 docker 的文件，如

sudo vi /etc/apt/sources.list

现在编辑该行

deb [arch=amd64] https://download.docker.com/linux/ubuntu artful stable

它的条目应该是这样的

deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable

（是的，xenial 没关系，它不巧妙，你仍然得到最新的 docker）现在让我们看看你安装了什么 docker 包......发出这个

dpkg -l | grep docker

你应该看到这个

ii  docker-ce       17.09.0~ce-0~ubuntu      amd64        Docker: the open-source application container engine

现在做一个更新

sudo apt-get update && sudo apt-get dist-upgrade

你现在被锁定并加载了吗？如果不是我们可以继续战斗

于 2017-12-02T18:16:01.403 回答