I am kind of confused about the relationship between sdkmanger and jetpack. I can use sdkmanager to flash the PX2. JetPack (the Jetson SDK) is an on-demand all-in-one package that bundles developer software for the NVIDIA® Jetson platform. So Can I say that sdkmanger contains the JetPack?
There is no any connection between SDK Manager and JetPack, just similar concept to provide an easier and convenient way for developers/customer to install those required SDK/Tools on their host PC or flashing the target platforms.
SDK Manager is for DRIVE AGX DevKit and DRIVE PX2 platforms; JetPack is for Jetson AGX Xavier/TXw/TX1/TK1 platforms.