I had a crontab situation, i.e. it wouldn’t work. I was trying to run
sudo crontab -e
When I should have just used
crontab -u username -e
This was for Ubuntu 16.04 running on a Jetson Tx2. The command itself was to run a script at boot up, such as:
@reboot sleep 10 && /usr/bin/python /home/nvidia/myScript.py
That did the trick.