Bet: command not found

hey everybody,

I am trying to extract the ROI signals for a lot of objects, I used DPARSF to do so, now that I am almost finished with the preprocessing steps, I found out that since I am working in ubuntu, I had to install FSL. The preprocessing took several days to complete for me, and I need to know if my results are accurate or if I should install FSL and run the preprocessing steps again.
Thank you very much for your time.

It's OK to skip bet.

Thank you very much.