I have tried to install gnucap (I downloaded it from the website http://ftp.gnu.org/gnu/gnucap/ with the extension .tar.gz) in the Ubuntu live-usb. I have tried to do it in the terminal with:
sudo apt-get install gnucap
But the problem is that it always tell me :
E:Unable to Locate Package
Could someone tell me what should I do to install the software?