Accessing the Terminal through your Aetina Jetson Unit, e.g. pressing keys Ctrl + Alt + T, you can issue one of the following commands:

$ cat /etc/nv_tegra_release

$ head -n 1 /etc/nv_tegra_release

To interpret the release information, e.g. L4T R35.4.1, which refers to JetPack version 5.1.2, please visit the NVIDIA JetPack Archive