I am trying to installing gfortran on my ubuntu system and I am following the steps mentioned in http://gcc.gnu.org/wiki/GFortranBinaries32Linux , unfortunately one of the step in the installation steps to says

Install using the following command:

tar -xzvf gfortran-4.5-linux-i686.tar.gz -C /

but the download link provides a .deb file which I have installed it. Now when I check for gfortran, it says not installed. Any clue? how should I follow the further?

Steps I have completed are:
1) Installed libraries: GMP Library, MPFR Library, and MPC Library.
2)Downloaded the gfortran-4.6 Debian and installed using the cmd. sudo dpkg -i .deb

anything else I need to do? do I need to create any path or symbolic link? please help,thanks! Please Note: I have no internet access and cannot use software center.