you can type these lines as it is in terminal and you can apt-get whatever you want.
Do type these lines at the end of some start up script so that next time you start the shell, the variable are already exported, e.g. you can type lines in .bash_profile file which is in your home folder.
-- Regards Rakesh
Linux, the choice of a GNU generation -o) Kernel 2.6.19 on a i686 /\ _\_v