I hope I'm doing this properly, but I've never put in a request for a feature before. It would be nice to have a button to open an ssh terminal, logged in as loginuser from Webadmin.
At this point, with the release coming real soon (according to posts here), I doubt they'd add this at this point. Try adding your feature request at Astaro Gateway Feature Requests ... they really do look at these, in fact, about 6 of my requests were added to V8 (I got the emails about it yesterday / today).
