Vasilis has noted correctly in the message above - unfortunately, File Transfer connection mode is yet to be implemented in Viewer for Mac/Linux. You can see the full list of features available in Viewer for Mac/Linux as well as the features that are going to be implemented in subsequent updates here, in the very first message.
In case if you mean something else, please let us know.
Hope that helps.
Yes, I made a mistake, i have been using RemoteUtilities with Windows and i forgot about the differences when i changed to Linux. Tank you so much for replying.
Could you please clarify if you mean the address book sync via RU Server feature? If this is the case, then this feature will be implemented in the final release of Viewer for Mac/Linux which we hope to release by the end of this year.