Readme: add jetson-io cmd line

Signed-off-by: Dmitry Perchanov <[email protected]>

README.md

@@ -144,18 +144,29 @@ on target:
 # sudo cp ~/Image /boot/
 sudo cp ~/tegra234-camera-d4xx-overlay.dtbo /boot/
 # backup:
-sudo cp -r /lib/modules/$(uname -r)/extra /lib/modules/$(uname -r)/extra.orig
+sudo tar -cjf /lib/modules/$(uname -r)/modules_$(uname -r)_extra.tar.bz2 /lib/modules/$(uname -r)/extra
 sudo cp -r ~/extra /lib/modules/$(uname -r)/
 ```
 
 Enable d4xx overlay:
 
+With Jetson-IO tool:
 `sudo /opt/nvidia/jetson-io/jetson-io.py`
 
 1.	Configure Jetson AGX CSI Connector
 2.	Configure for compatible hardware
 3.	Jetson RealSense Camera D457
 
+With command line
+
+`sudo /opt/nvidia/jetson-io/config-by-hardware.py -n 2="Jetson RealSense Camera D457"`
+
+Expected:
+```
+nvidia@ubuntu:~$ sudo /opt/nvidia/jetson-io/config-by-hardware.py -n 2="Jetson RealSense Camera D457"
+Configuration saved to /boot/tegra234-camera-d4xx-overlay.dtbo.
+Reboot system to reconfigure.
+```
 Enable d4xx autoload:
 
 `echo "d4xx" | sudo tee /etc/modules-load.d/d4xx.conf`