Read L4T version from Jetpack 4.2.1

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi all,

I am using nv_tegra_release to read the version installed in my L4T, following How do I know what version of L4T my Jetson TK1 is running? - Jetson TK1 - NVIDIA Developer Forums

/etc/nv_tegra_release

I see from Jetpack 4.2.1 this file doesn’t exist or is not in “/etc” folder. Where can I find the version from this Jetpack?

Best regards,
Raffaello

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2

Hi Raffaello, moving forward, its recommended to read the version using dpkg from nvidia-l4t-core package.

For reference, see this script which can handle it both ways:

[url]https://github.com/dusty-nv/jetson-inference/blob/7e81381a96c1ac5f57f1728afbfdec7f1bfeffc2/tools/install-pytorch.sh#L296[/url]

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3

HI Dustin!

Thank you! I will use soon to update my jetson_stats!

4

Hi Dustin!

Thx, I fixed my file GitHub - rbonghi/jetson_stats: 📊 Simple package for monitoring and control your NVIDIA Jetson [Xavier NX, Nano, AGX Xavier, TX1, TX2] project

And I suggest to fix in your code with these lines. You can read all numbers JETSON_L4T_REVISION:

# Read version
JETSON_L4T_STRING=$(dpkg-query --showformat='${Version}' --show nvidia-l4t-core)
# extract version
JETSON_L4T_ARRAY=$(echo $JETSON_L4T_STRING | cut -f 1 -d '-')
# Load release and revision
JETSON_L4T_RELEASE=$(echo $JETSON_L4T_ARRAY | cut -f 1 -d '.')
JETSON_L4T_REVISION=${JETSON_L4T_ARRAY#"$JETSON_L4T_RELEASE."}
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