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[#]: collector: (lujun9972)
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[#]: translator: (geekpi)
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (How to Reinstall Ubuntu in Dual Boot or Single Boot Mode)
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[#]: via: (https://itsfoss.com/reinstall-ubuntu/)
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[#]: author: (Abhishek Prakash https://itsfoss.com/author/abhishek/)
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How to Reinstall Ubuntu in Dual Boot or Single Boot Mode
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======
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If you have messed up your Ubuntu system and after trying numerous ways to fix it, you finally give up and take the easy way out: you reinstall Ubuntu.
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We have all been in a situation when reinstalling Linux seems a better idea than try to troubleshoot and fix the issue for good. Troubleshooting a Linux system teaches you a lot but you cannot always afford to spend more time fixing a broken system.
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There is no Windows like recovery drive system in Ubuntu as far as I know. So, the question then arises: how to reinstall Ubuntu? Let me show you how can you reinstall Ubuntu.
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Warning!
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Playing with disk partitions is always a risky task. I strongly recommend to make a backup of your data on an external disk.
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### How to reinstall Ubuntu Linux
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![][1]
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Here are the steps to follow for reinstalling Ubuntu.
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#### Step 1: Create a live USB
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First, download Ubuntu from its website. You can download [whichever Ubuntu version][2] you want to use.
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[Download Ubuntu][3]
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Once you have got the ISO image, it’s time to create a live USB from it. If your Ubuntu system is still accessible, you can create a live disk using the startup disk creator tool provided by Ubuntu.
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If you cannot access your Ubuntu system, you’ll have to use another system. You can refer to this article to learn [how to create live USB of Ubuntu in Windows][4].
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#### Step 2: Reinstall Ubuntu
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Once you have got the live USB of Ubuntu, plugin the USB. Reboot your system. At boot time, press F2/10/F12 key to go into the BIOS settings and make sure that you have set Boot from Removable Devices/USB option at the top. Save and exit BIOS. This will allow you to boot into live USB.
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Once you are in the live USB, choose to install Ubuntu. You’ll get the usual option for choosing your language and keyboard layout. You’ll also get the option to download updates etc.
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![Go ahead with regular installation option][5]
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The important steps comes now. You should see an “Installation Type” screen. What you see on your screen here depends heavily on how Ubuntu sees the disk partitioning and installed operating systems on your system.
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[][6]
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Suggested read How to Update Ubuntu Linux [Beginner's Tip]
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Be very careful in reading the options and its details at this step. Pay attention to what each options says. The screen options may look different in different systems.
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![Reinstall Ubuntu option in dual boot mode][7]
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In my case, it finds that I have Ubuntu 18.04.2 and Windows installed on my system and it gives me a few options.
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The first option here is to erase Ubuntu 18.04.2 and reinstall it. It tells me that it will delete my personal data but it says nothing about deleting all the operating systems (i.e. Windows).
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If you are super lucky or in single boot mode, you may see an option where you can see a “Reinstall Ubuntu”. This option will keep your existing data and even tries to keep the installed software. If you see this option, you should go for it it.
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Attention for Dual Boot System
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If you are dual booting Ubuntu and Windows and during reinstall, your Ubuntu system doesn’t see Windows, you must go for Something else option and install Ubuntu from there. I have described the [process of reinstalling Linux in dual boot in this tutorial][8].
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For me, there was no reinstall and keep the data option so I went for “Erase Ubuntu and reinstall”option. This will install Ubuntu afresh even if it is in dual boot mode with Windows.
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The reinstalling part is why I recommend using separate partitions for root and home. With that, you can keep your data in home partition safe even if you reinstall Linux. I have already demonstrated it in this video:
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Once you have chosen the reinstall Ubuntu option, the rest of the process is just clicking next. Select your location and when asked, create your user account.
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![Just go on with the installation options][9]
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Once the procedure finishes, you’ll have your Ubuntu reinstalled afresh.
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In this tutorial, I have assumed that you know things because you already has Ubuntu installed before. If you need clarification at any step, please feel free to ask in the comment section.
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[][10]
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Suggested read How To Fix No Wireless Network In Ubuntu
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--------------------------------------------------------------------------------
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via: https://itsfoss.com/reinstall-ubuntu/
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作者：[Abhishek Prakash][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://itsfoss.com/author/abhishek/
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[b]: https://github.com/lujun9972
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[1]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2019/08/Reinstall-Ubuntu.png?resize=800%2C450&ssl=1
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[2]: https://itsfoss.com/which-ubuntu-install/
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[3]: https://ubuntu.com/download/desktop
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[4]: https://itsfoss.com/create-live-usb-of-ubuntu-in-windows/
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[5]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2019/08/reinstall-ubuntu-1.jpg?resize=800%2C473&ssl=1
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[6]: https://itsfoss.com/update-ubuntu/
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[7]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/08/reinstall-ubuntu-dual-boot.jpg?ssl=1
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[8]: https://itsfoss.com/replace-linux-from-dual-boot/
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[9]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/08/reinstall-ubuntu-3.jpg?ssl=1
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[10]: https://itsfoss.com/fix-no-wireless-network-ubuntu/
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@ -0,0 +1,95 @@
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[#]: collector: (lujun9972)
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[#]: translator: (geekpi)
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (How to Reinstall Ubuntu in Dual Boot or Single Boot Mode)
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[#]: via: (https://itsfoss.com/reinstall-ubuntu/)
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[#]: author: (Abhishek Prakash https://itsfoss.com/author/abhishek/)
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如何在双启动或单启动模式下重新安装 Ubuntu
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======
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如果你弄坏了你的 Ubuntu 系统，并尝试了很多方法来修复，你最终放弃并采取简单的方法：重新安装 Ubuntu。
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我们一直遇到这样一种情况，重新安装 Linux 似乎比找出问题并解决来得更好。排查 Linux 故障能教你很多，但你不会总是花费更多时间来修复损坏的系统。
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据我所知，Ubuntu 中没有像 Windows 那样的系统恢复分区。那么，问题出现了：如何重新安装 Ubuntu？让我告诉你如何重新安装 Ubuntu。
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警告！
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磁盘分区始终是一项危险的任务。我强烈建议你在外部磁盘上备份数据。
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### 如何重新安装 Ubuntu Linux
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![][1]
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以下是重新安装 Ubuntu 的步骤。
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#### 步骤 1：创建一个 live USB
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首先，在网站上下载 Ubuntu。你可以下载[任何需要的 Ubuntu 版本][2]。
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[Download Ubuntu][3]
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获得 ISO 镜像后，就可以创建 live USB 了。如果 Ubuntu 系统仍然可以使用，那么可以使用 Ubuntu 提供的启动盘创建工具创建它。
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如果无法使用你的 Ubuntu，那么你可以使用其他系统。你可以参考这篇文章来学习[如何在 Windows 中创建 Ubuntu的 live USB][4]。
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#### 步骤 2：重新安装 Ubuntu
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有了 Ubuntu 的 live USB 之后插入 USB。重新启动系统。在启动时，按下 F2/10/F12 键进入 BIOS 设置，并确保已在顶部设置 “Boot from Removable Devices/USB”。保存并退出 BIOS。这将启动进入 live USB。
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进入 live USB 后，选择安装 Ubuntu。你将看到选择语言和键盘布局这些常用选项。你还可以选择下载更新等。
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![Go ahead with regular installation option][5]
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现在是重要的步骤。你应该看到一个“安装类型”页面。你在屏幕上看到的内容在很大程度上取决于 Ubuntu 如何处理系统上的磁盘分区和安装的操作系统。
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在此步骤中仔细阅读选项及它的细节。注意每个选项的说明。屏幕上的选项可能在不同的系统中看上去不同。
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![Reinstall Ubuntu option in dual boot mode][7]
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在这里，它发现我的系统上安装了 Ubuntu 18.04.2 和 Windows，它给了我一些选项。
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第一个选项是擦除 Ubuntu 18.04.2 并重新安装它。它告诉我它将删除我的个人数据，但它没有说删除所有操作系统（即 Windows）。
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如果你非常幸运或处于单一启动模式，你可能会看到一个“重新安装 Ubuntu” 的选项。此选项将保留现有数据，甚至尝试保留已安装的软件。如果你看到这个选项，那么就用它吧。
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双启动系统注意
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如果你是双启动 Ubuntu 和 Windows，并且在重新安装中，你的 Ubuntu 系统看不到 Windows，你必须选择 “Something else” 选项并从那里安装 Ubuntu。我已经在[在双启动下安装 Linux 的过程][8]这篇文章中说明了。
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对我来说，没有重新安装并保留数据的选项，因此我选择了“擦除 Ubuntu 并重新安装”。该选项即使在 Windows 的双启动模式下，也将重新安装 Ubuntu。
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我建议为 root 和 home 使用单独分区就是为了重新安装。这样，即使重新安装 Linux，也可以保证 home 分区中的数据安全。我已在此视频中演示过：
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选择重新安装 Ubuntu 后，剩下就是单击下一步。选择你的位置、创建用户账户。
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![Just go on with the installation options][9]
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以上完成后，你就完成重装 Ubuntu 了。
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在本教程中，我假设你已经知道我说的东西，因为你之前已经安装过 Ubuntu。如果需要澄清任何一个步骤，请随时在评论栏询问。
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--------------------------------------------------------------------------------
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via: https://itsfoss.com/reinstall-ubuntu/
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作者：[Abhishek Prakash][a]
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选题：[lujun9972][b]
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译者：[geekpi](https://github.com/geekpi)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://itsfoss.com/author/abhishek/
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[b]: https://github.com/lujun9972
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[1]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2019/08/Reinstall-Ubuntu.png?resize=800%2C450&ssl=1
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[2]: https://itsfoss.com/which-ubuntu-install/
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[3]: https://ubuntu.com/download/desktop
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[4]: https://itsfoss.com/create-live-usb-of-ubuntu-in-windows/
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[5]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2019/08/reinstall-ubuntu-1.jpg?resize=800%2C473&ssl=1
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[7]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/08/reinstall-ubuntu-dual-boot.jpg?ssl=1
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[8]: https://itsfoss.com/replace-linux-from-dual-boot/
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[9]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/08/reinstall-ubuntu-3.jpg?ssl=1
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