The Processor SDK Linux J721e provides Filesystem Images that contain programs, scripts, Linux user-space components that abstract various hardware accelerators available in the SoC. The Filesystem can be fully assembled via Yocto, following the instructions Processor_SDK_Building_The_SDK.
There are different filesystem images provided in the SDK. You’ll find them at the SDK Installation directory/filesystem/ folder.
This is the complete filesystem image, that contains standard Linux commands and features. This also contains the TI component libraries, binaries and out of box examples.