All new models of Guardant dongles, starting with Guardant Sign, support Linux, and also operate in HID-mode.
The operation of protected Windows embedded applications under WINE is also supported.
In order to operate a dongle in GNU/Linux it is necessary to add a rule for the onboard processing tool HotPlugging. On most of the currently distributed releases using the 2.6.x kernel, the needed tool is udev.
The syntax for adding a rule using udev is as follows:
For dongles in the driver mode, and in cases when using USB Device File-system device files
# cp etc/grdnt.udev /etc/udev/rules.d/95-grdnt.rules
For dongles in HID mode:
# cp etc/grdnt_hid.udev /etc/udev/rules.d/95-grdnt_hid.rules
You need superuser privileges to write in the /etc/udev/rules.d folder
The mentioned rules prescribe udev to set read and write rights for a device file representing the Guardant dongle in the system. This allows assigning the dongle with the privileges of any user on the system.