Can you please clarify your question. What Linux distribution are you using, what are you planning to do, what is your programming interface(LabVIEW or python or what) and where are you listing the device.
It looks like the USB multifunction I/O devices are not supported in Linux. The latest readme file for the DAQmx Linux drivers is linked here https://download.ni.com/ni-linux-desktop/2020.07/readme/drivers/readme_NI-DAQmx . This file gives a list of all DAQmx devices supported on Linux. Several CompactDAQ chassis and many PCI(e)/PXI(e) modules are supported but I didn't find the USB-6000 series in the list.