Temporary documentation for JTN setup with Ubuntu 20.04 (JetPack 4.6 - L4T 32.6.1)

Step 1: Download image

Qengineering has an image for the NVIDIA Jetson Nano running JetPack 4.6 and Ubuntu 20.04, in addition to OpenCV compiled with CUDA support, TensorFlow, PyTorch, TorchVision, TensorRT and jtop.

As an example, this is what my machine outputs after I flashed the image and ran it on the JTN.

You can follow the installation steps he has listed to download and flash your own SD card.

Step 2: Configure the JTN with the new image

For the first time logging into the Jetson, you will have to connect the JTN to your laptop via microUSB. SSH in with the commands

xhost +
ssh [email protected]

Password: jetson

Once inside the JTN, you should see

jetson@nano:~$

To set up your JTN to the UCSDRoboCar WiFi access point:

Activate network.

sudo systemctl start networking.service

List available networks.

sudo nmcli device wifi list

Connect to a RoboCar network.

sudo nmcli device wifi connect UCSDRoboCar password UCSDrobocars2018

Connection should be confirmed for wlan0. Now get the IP address of your JTN to connect remotely.

ifconfig

Take note of the IP address at inet (i.e. 192.168.11.63).

To connect via WiFi, open a terminal and SSH using the IP you just noted.

ssh [email protected]

The password should still be the same: jetson. Once you're in, you can change the hostname and password. First, turn off Power Saving for the WiFi device.

sudo iw dev wlan0 set power_save off

Install nano for simple file editing from the command line.

sudo apt-get update
sudo apt-get install nano

Edit the file to make the WiFi settings consistent.

sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

Change wifi.powersave from 3 to 2.

wifi.powersave = 2

Now let's change the hostname and password. View the current configuration:

hostnamectl

Change the hostname by editing the file with nano.

sudo nano /etc/hosts

You might see the following output:

127.0.0.1    nano
127.0.0.0    jetson

For this example, I changed nano to ucsdrobocar-148-exp for experimental.

127.0.0.1    ucsdrobocar-148-exp
127.0.0.0    jetson

Now change the password.

passwd

After running this command you will be prompted to enter the old password and then your new password.