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116 lines
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[#]: subject: "How to Update or Upgrade Ubuntu Offline without Internet"
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[#]: via: "https://www.debugpoint.com/how-to-update-or-upgrade-ubuntu-offline-without-internet/"
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[#]: author: "Arindam https://www.debugpoint.com/author/admin1/"
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[#]: collector: "lkxed"
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[#]: translator: " "
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[#]: reviewer: " "
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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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======
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**This guide explains the steps to update Ubuntu offline without an active internet connection.**
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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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Of course, updating any system while connected to the internet is always recommended.
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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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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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### Pre-requisite
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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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### Install 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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```
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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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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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[download .deb files – 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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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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```
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sudo apt-offline set ~/offline-data.sig
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```
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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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[![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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Create a directory (see example below) to hold the downloaded packages in the Ubuntu system with an internet connection.
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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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```
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apt-offline get -d ~/offline-data-dir offline-data.sig
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```
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[![Download the packages to install offline][7]][8]
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offline Ubuntu system
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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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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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```
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sudo apt-offline install offline-data-dir/
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```
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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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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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--------------------------------------------------------------------------------
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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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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://www.debugpoint.com/author/admin1/
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[b]: https://github.com/lkxed
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[1]: https://github.com/rickysarraf/apt-offline
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[2]: https://packages.ubuntu.com/focal/all/apt-offline/download
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[3]: https://www.debugpoint.com/wp-content/uploads/2021/03/Create-the-sig-file-1024x204.jpg
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[4]: https://www.debugpoint.com/wp-content/uploads/2021/03/Create-the-sig-file.jpg
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[5]: https://www.debugpoint.com/wp-content/uploads/2021/03/sig-file-contents-1024x250.jpg
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[6]: https://www.debugpoint.com/wp-content/uploads/2021/03/sig-file-contents.jpg
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[7]: https://www.debugpoint.com/wp-content/uploads/2021/03/Download-the-packages-to-install-offline-1024x437.jpg
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[8]: https://www.debugpoint.com/wp-content/uploads/2021/03/Download-the-packages-to-install-offline.jpg
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[9]: https://www.debugpoint.com/wp-content/uploads/2021/03/Installing-packages-offline-update-ubuntu-1024x509.jpg
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[10]: https://www.debugpoint.com/wp-content/uploads/2021/03/Installing-packages-offline-update-ubuntu.jpg
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