The tool provided by NVIDIA can be used to monitor the Jetson devices, through the Terminal window, using the command below, you can install jtop, the easiest way is to use the Python Install Package (pip) to install the jetson-stats PyPi, using the commands:
$ sudo apt update
$ sudo apt install python3-pip
$ sudo pip3 install -U jetson-stats
$ sudo jtop
The jtop is shown in the Terminal
It displays information about:
jtop displays the output from the Jetson power monitors and temperature sensors.