Thanks, I found a thread in the forum of another user that had similar libcurl problem Ubuntu installtion
I also had the same problem with $(logname) which seems that is empty since Ubuntu version 16 for security reasons.
I have managed to activate my license and run nuitrack_sample with Intel D415.
I have a another question: I tried first Ubuntu 18 and then downgrade to 16 when I found th Nuitrack installation issues. Now that I see that the issues were not related to Ubuntu version I would like to go back to Ubuntu 18.
Do I have to deactivate the license to install it in another system or the license is linked to the sensor?
Thanks again
Joaquim