this is the first time I am trying to setup adb to connect s2 with my ubuntu desktop. However, when I run adb devices and/or adb usb it cannot detect t
adb devices
adb usb
Try this universal udev rule, which matches all adb and fastboot interfaces regardless of vendor ID:
adb
fastboot
ACTION=="add", SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ENV{ID_USB_INTERFACES}=="*:ff420?:*", MODE="0666"