The ownCloud client is available for many Linux distributions. On the download webpage, however, only the basic distributions are mentioned. Many of the other versions are based on one of those basic distributions. Linux MINT 17.x, for example, is based on xUbuntu 14.04. The prefix x just represents the various Ubuntu versions. The installation instructions given work here as well. In case you use a different distribution, please visit the website of your provider for information. In the near future we will be able to offer a specific sciebo client.