You can use Zeplin on Linux distributions like Ubuntu or Fedora, using our Web app: https://app.zeplin.io
If you're a developer, when your designer uploads the designs to Zeplin and invites you to the project, you'll be able to access all the details through the Web app. It offers the same functionality as the desktop apps, except for uploading designs.
We're also planning to work on a dedicated Linux app in the near future! 🙌