Okay a college of mine just showed me that you could do
sudo apt-get install <type first letters of package> <TAB>
That it auto-completes the name of the package. Just for an example...
sudo apt-get install ged<TAB> results in
sudo apt-get install gedit
Now I tried to do this but this does not work for me.
How can I solve this? Do I have to install a package? My college told me that he didn't install anything extra for it.