Hi, when I run
sudo apt update && sudo apt upgrade
on fresh installation of TX2 i got this message:
W: Invalid 'Date' entry in Release file /var/lib/apt/lists/_var_nv-gie-repo-ga-cuda8.0-gie1.0-20170116_Release W: GPG error: file:/var/libopencv4tegra-repo Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY D88C3D385C37D3BE E: The repository 'file:/var/libopencv4tegra-repo Release' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.
thanks for help