Oh yes, that is Second Life running on Ubuntu64.
Download the client here: SecondLife for GNU/Linux
Get this file: “Linux i686: 184.108.40.206 (Alpha) (50 MB)”
I know, it says i686 which refers to 32-bit but trust me it will run.
And no need to install, just extract it anywhere you want and run the secondlife file located in the extracted folder.
See you in-game!
SLname: Yarso Loire
<span class='p-name'>Second Life in Ubuntu64</span> by gameshogun™ is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Permissions beyond the scope of this license may be available at Legal Notice.