If you have failed to install a driver, erase it first.
1) Download a driver for linux from Samsung. Samsung M2070 Linux Printer/Scanner Driver (15.87 MB) is at http://www.samsungdrivers.net/samsung-m2070-driver/
2) Unzip your downloaded file.
3) Make sure about the location of the directory which contains a file named " install.sh ". It must be in downloads/XXXX(You named!!)/ uld.
I repeat. " install.sh " is in ULD.
4) Open TERMINAL to go to the directory which has " install.sh " in it.
cd downloads
cd XXXX
cd uld
5) Install a driver by command.
sudo ./install.sh
Note that you have to hit "Enter" many many times to reach the line which asks you to choose y/n. Go slow. Otherwise you'll have to go back to the directory of ULD and command again.
Hope you can make it!!