how can i change the runlevel of ubuntu in the TX1

i need run the single mode , can i set the runlevel 1 .

I have not had complete luck with changing runlevels in Jetsons. I can’t test right now, but typically something like (I just lost my home partition and am rebuilding my system, so I no longer have reference file systems without going directly to the Jetson…and the PC needs to be rebuilt to get to that):

sudo systemctl isolate