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+[#]: subject: "Fixing “cannot find signatures with metadata for snap” Error in Ubuntu and other Linux"
+[#]: via: "https://itsfoss.com/snap-metadata-signature-error/"
+[#]: author: "Abhishek Prakash https://itsfoss.com/author/abhishek/"
+[#]: collector: "lkxed"
+[#]: translator: " "
+[#]: reviewer: " "
+[#]: publisher: " "
+[#]: url: " "
+
+Fixing “cannot find signatures with metadata for snap” Error in Ubuntu and other Linux
+======
+
+The other day I was trying to install [massCode][1] application. For installation, it provided a Snap file to download.
+
+When I tried to install the application from Snap file
+
+```
+sudo snap install snap_file
+```
+
+It gave me the following error:
+
+**error: cannot find signatures with metadata for snap “masscode_2.6.1_amd64.snap”**
+
+![cannot find signature with metadata for snap][2]
+
+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.
+
+The ‘fix’ is easy and simple. Let me explain it to you.
+
+### Handling “cannot find signatures with metadata for snap” error
+
+There are no signatures involved here.
+
+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.
+
+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.
+
+So, what’s the solution here?
+
+Any snap package that is not distributed through the Snap store has to be installed with the**–dangerous flag**. That’s the rule.
+
+```
+sudo snap install --dangerous path_to_snap_file
+```
+
+This way, you tell the snap package manager to explicitly install the snap package.
+
+Here, I used this flag and was able to install massCode from its snap package successfully.
+
+![installing third party snap packages][4]
+
+How ‘dangerous’ is it to install snap packages this way? Almost the same as downloading and [installing packages in deb format][5].
+
+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.
+
+Of course, you should first search if the package is available in the snap store or not:
+
+```
+snap find package_name
+```
+
+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].
+
+--------------------------------------------------------------------------------
+
+via: https://itsfoss.com/snap-metadata-signature-error/
+
+作者：[Abhishek Prakash][a]
+选题：[lkxed][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://itsfoss.com/author/abhishek/
+[b]: https://github.com/lkxed
+[1]: https://masscode.io/
+[2]: https://itsfoss.com/wp-content/uploads/2022/07/cannot-find-signature-with-metadata-for-snap-800x205.png
+[3]: https://itsfoss.com/adding-external-repositories-ubuntu/
+[4]: https://itsfoss.com/wp-content/uploads/2022/07/installing-third-party-snap-packages-800x358.png
+[5]: https://itsfoss.com/install-deb-files-ubuntu/
+[6]: https://itsfoss.com/use-snap-packages-ubuntu-16-04/