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84 lines
3.4 KiB
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84 lines
3.4 KiB
Markdown
[#]: subject: "Fixing “cannot find signatures with metadata for snap” Error in Ubuntu and other Linux"
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[#]: via: "https://itsfoss.com/snap-metadata-signature-error/"
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[#]: author: "Abhishek Prakash https://itsfoss.com/author/abhishek/"
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[#]: collector: "lkxed"
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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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Fixing “cannot find signatures with metadata for snap” Error in Ubuntu and other Linux
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======
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The other day I was trying to install [massCode][1] application. For installation, it provided a Snap file to download.
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When I tried to install the application from Snap file
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```
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sudo snap install snap_file
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```
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It gave me the following error:
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**error: cannot find signatures with metadata for snap “masscode_2.6.1_amd64.snap”**
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![cannot find signature with metadata for snap][2]
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That was strange. While [adding external repositories in Ubuntu][3], you have to add the GPG key. But no such things were provided by the developer here.
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The ‘fix’ is easy and simple. Let me explain it to you.
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### Handling “cannot find signatures with metadata for snap” error
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There are no signatures involved here.
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What happens is that you have downloaded a Snap installer file from a third party. The snap mechanism in Ubuntu expects you to get the snap packages from the official snap store.
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Since it doesn’t come from the snap store, you see the ‘cannot find signatures with metadata for snap’ error message. The error message is not descriptive, like most error messages.
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So, what’s the solution here?
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Any snap package that is not distributed through the Snap store has to be installed with the**–dangerous flag**. That’s the rule.
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```
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sudo snap install --dangerous path_to_snap_file
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```
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This way, you tell the snap package manager to explicitly install the snap package.
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Here, I used this flag and was able to install massCode from its snap package successfully.
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![installing third party snap packages][4]
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How ‘dangerous’ is it to install snap packages this way? Almost the same as downloading and [installing packages in deb format][5].
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In my opinion, if you are downloading the snap package from the project developer’s website, you are already entrusting the project. In such cases, you can install it with the –dangerous flag.
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Of course, you should first search if the package is available in the snap store or not:
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```
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snap find package_name
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```
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I hope this quick little tip helped you fix the Snap error. If you have questions or suggestions please let me know. If you want to learn more, see [this guide on using Snap commands][6].
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--------------------------------------------------------------------------------
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via: https://itsfoss.com/snap-metadata-signature-error/
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作者：[Abhishek Prakash][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://itsfoss.com/author/abhishek/
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[b]: https://github.com/lkxed
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[1]: https://masscode.io/
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[2]: https://itsfoss.com/wp-content/uploads/2022/07/cannot-find-signature-with-metadata-for-snap-800x205.png
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[3]: https://itsfoss.com/adding-external-repositories-ubuntu/
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[4]: https://itsfoss.com/wp-content/uploads/2022/07/installing-third-party-snap-packages-800x358.png
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[5]: https://itsfoss.com/install-deb-files-ubuntu/
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[6]: https://itsfoss.com/use-snap-packages-ubuntu-16-04/
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