you have to be in that folder to be able to run these comands, open the terminal and use cd to go there (cd /home/knoppix/Desktop/inst).
with that done you can run the first two comands as yourself (installpath=/home/knoppix/Desktop/inst, make)
only the 5-7 need root as far as i know

as far as I know you need not be root to run make. but might be something very special in this case (no idea what though), try without being root and see.