Jetson TK1 Unable to locate package cuda-toolkit-6-5

I am new to Jetson and I tried to install cuda toolkit to try some examples, I done all like in
https://gist.github.com/jetsonhacks/6da905e0675dcb5cba6f
but when it reaches line 14 ( all commands in lines till 14 are executed successfully, same I got when I try to install on different way which I have found on net always sudo apt-get install cuda-toolkit-6-5 ) I get error message Unable to locate package cuda-toolkit-6-5. Did anyone had similar problems ?

When I do apt-cache search cuda-toolkit nothing is found.