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[#]: publisher: " "
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[#]: url: " "
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How to Update or Upgrade Ubuntu Offline without Internet
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如何在没有网络的情况下，离线更新或升级 Ubuntu
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======
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**This guide explains the steps to update Ubuntu offline without an active internet connection.**
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**此教程关于如何一步一步在没有网络的情况下，升级ubuntu**
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There are many situations where you may need to update your Ubuntu installation without an internet connection. You may be staying remotely or have a set of network Ubuntu systems that are not connected to the internet. In any case, keeping your system updated with the latest packages is always required.
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在有些情况下，你可能需要离线更新ubuntu，又或者你可能在远程状态下需要更新一堆未联网的ubuntu，总的来说你想要升级最新的系统
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Of course, updating any system while connected to the internet is always recommended.
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当然，始终建议通过联网升级系统。
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But sometimes, it is not possible for security reasons also. Connecting to the internet may bring additional hardening steps for your systems to protect them from hackers and malware.
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但有时，离线更新系统，有助于网络安全，远离黑客和恶意软件
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The following method using [apt-offline][1] helps to fix those use cases and outlines the steps to update your Ubuntu offline without the internet.
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以下的方法使用[apt-offline][1]来解决这些问题，离线更新ubuntu
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### 准备环节
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### Pre-requisite
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- 一台能连接到网络的ubuntu（你朋友的，咖啡馆，实验室系统）
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- 装了安装包的u盘
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- 两个系统都安装了 apt-offline.一个系统离线，另一个系统联网
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- You need to have access to a Ubuntu system that has an internet connection (e.g. your friends, cafe, or lab system)
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- A USB pen drive to hold the packages
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- Install the apt-offline package in both the systems – a) the offline system and b) the system with an internet connection.
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### 安装 apt-offline
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### Install apt-offline
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在两个系统下安装apt-offline
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both systems
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You can install the `apt-offline` using the following command. Remember, you have to get it installed in .
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你可以使用以下命令安装 apt-offline。
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```
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sudo apt install apt-offline
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```
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In case you need the `apt-offline` to be installed in the target system, you can download the deb package from the below link and copy it to the target system via a USB stick. Then run the below command to install.
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如果你想装离线安装 apt-offline ，你可以提前下载到u盘里，然后拷出来，再使用下面的命令
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The download link for Ubuntu 22.04 LTS and other versions is present below. You can choose a mirror and download the deb file.
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Ubuntu 22.04 LTS 和其他版本的下载链接如下所示。您可以选择一个镜像并下载 deb 文件。
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[download .deb files – apt-offline][2]
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[下载 .deb 文件 – apt-offline][2]
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```
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sudo dpkg -i name_of_package.deb
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```
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### Update Ubuntu offline: Steps
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### 如何更新ubuntu
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Open a terminal in the offline Ubuntu system and create a signature file using the following command in your home directory.
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离线打开终端，且使用以下命令创建一个.sig签名文件
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```
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sudo apt-offline set ~/offline-data.sig
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@ -56,15 +55,15 @@ sudo apt-offline set ~/offline-data.sig
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[![Create the sig file][3]][4]
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This creates a file containing the required package paths and details for download.
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这个刚创建的签名文件中，包含下载所需的包路径和详细信息。
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[![sig file contents][5]][6]
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Copy this .sig file to a USB and take it to a Ubuntu system with internet access.
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把签名文件，拷到u盘中，再插到有网的ubuntu
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Create a directory (see example below) to hold the downloaded packages in the Ubuntu system with an internet connection.
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创建有一个目录去装这些文件
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Open a terminal and run the following command to download the required packages. Remember to change the download directory and .sig file path as per your system.
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打开一个终端，运行以下命令，记得根据你的系统，更改下载目录和.sig签名文件的路径
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```
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apt-offline get -d ~/offline-data-dir offline-data.sig
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@ -72,11 +71,11 @@ apt-offline get -d ~/offline-data-dir offline-data.sig
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[![Download the packages to install offline][7]][8]
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offline Ubuntu system
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更新离线的Ubuntu
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You should see the files are downloaded properly. Now copy the entire downloaded directory to the USB drive and plug it into the .
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文件下载完，拷贝整个目录，再插到没联网的ubuntu
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Then run the following command to install the downloaded packages to the offline system. Change the directory path as per your system.
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然后运行以下命令将下载的包装到离线系统，记得根据你的系统更改目录路径
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```
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sudo apt-offline install offline-data-dir/
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@ -84,19 +83,18 @@ sudo apt-offline install offline-data-dir/
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[![Installing packages - offline update ubuntu][9]][10]
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The update should run smoothly if all goes well, and you should have an updated Ubuntu system.
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如果一切顺利，你将获得一个更新完的ubuntu
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You must repeat the steps above to keep your Ubuntu system up-to-date offline whenever you need to update.
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I hope this guide helps you to update your Ubuntu system in an offline mode. If you face any trouble, let me know in the comment box below.
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重复食用以上步骤，就可以保持你的离线ubuntu是最新版
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希望以上教程能帮到你更新离线的ubnuntu系统，如果您遇到任何问题，请在下面的评论框中告诉我。
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--------------------------------------------------------------------------------
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via: https://www.debugpoint.com/how-to-update-or-upgrade-ubuntu-offline-without-internet/
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作者：[Arindam][a]
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选题：[lkxed][b]
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译者：[译者ID](https://github.com/译者ID)
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译者：[littlebirdnest](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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