Where are I can run the “./source_sync.sh” command at TX2, Now I use sdkmanager download the jetpack.
If you have installed in the default location then you will find it in the root of the Linux_for_Tegra directory. You may have multiple if you work with different Jetpack versions and/or different target hardware like Xavier, Tx2, and Nano. On my system:
~/nvidia/nvidia_sdk/JetPack_4.2_Linux_P3448/Linux_for_Tegra/source_sync.sh
~/nvidia/nvidia_sdk/JetPack_4.2.1_Linux_GA_P3310/Linux_for_Tegra/source_sync.sh
~/nvidia/nvidia_sdk/JetPack_4.2.1_Linux_GA_P3448/Linux_for_Tegra/source_sync.sh
~/nvidia/nvidia_sdk/JetPack_4.2_Linux_P3310/Linux_for_Tegra/source_sync.sh
~/nvidia/nvidia_sdk/JetPack_4.2.1_Linux_GA_P2888/Linux_for_Tegra/source_sync.sh
~/nvidia/nvidia_sdk/JetPack_4.2_Linux_P2888/Linux_for_Tegra/source_sync.sh