I've got a Pi2 with a PiFace RTC module, but I can't install the RTC. Here is the webpage: PiFace and the documentation. Please help me how can I install with SSH.
It would help to know what chip is used - the piface documentation is a little sketchy at best. It would also help if you could link the install script as that might help. It may be as simple as adding dtoverlay=i2c-rtc,<chip> to /flash/config.txt but if the chipset is not included in the kernel, then you are out of luck.