There should be a file in /lib/udev/rules.d called: 99-nightscape.rules Containing: ACTION=="add", ATTR{idVendor}=="19b4", RUN+="/bin/sh -c '/bin/echo 256 >/sys/module/usbcore/parameters/usbfs_memory_mb'" # All Celestron Nightscape Cameras SUBSYSTEMS=="usb", ATTR{idVendor}=="19b4", MODE="0666"Read More...