fortran instalation

[dimosaaaa]

hello!
I just downloaded fortran (l_fcompxe_intel64_2011.9.293) but i face some problems during installation . I stared as a root user to install fortran and after a while says:
Step no: 1 of 6 | Options > Missing Optional Pre-requisite(s)
There are one or more optional unresolved issues. It is highly recommended to
resolve them all before you continue the installation. You can fix them without
exiting from
the installation and re-check. Or you can quit from the installation, fix them
and run the installation again.
--------------------------------------------------------------------------------
Missing optional pre-requisites
-- unsupported OS
--------------------------------------------------------------------------------
1. Skip missing optional pre-requisites [default]
2. Show the detailed info about issue(s)
3. Re-check the pre-requisites

h. Help
b. Back to the previous menu
q. Quit
--------------------------------------------------------------------------------
Please type a selection or press "Enter" to accept default choice [1]:

What should i do to overcome this problem???
Do i have to install rpms (this is a subfolder, but has many rpm folders for extract and i don't know what to chooose).
please help
thanks in advance

 

[dimosaaaa]

when i type option 2 says:
Detected operating system is not supported. Supported operating systems for this
release include:
- Red Hat Enterprise Linux* 4.0, 5.0, 6.0 (IA-32/Intel(R) 64)
- Fedora* 15 (IA-32/Intel(R) 64)
- SuSE Linux* Enterprise Server* 10.x, 11.0 SP1(IA-32/Intel(R)64)
- Asianux* Server 3.0, 4.0 (IA-32/Intel(R) 64)
- Ubuntu* 10.04 LTS, 11.04 (IA-32/Intel(R) 64)
- Debian 6.0 (IA-32/Intel(R) 64)
- Pardus 2011.2 (Intel(R) 64)
--------------------------------------------------------------------------------
1. Finish with prerequisites and continue installation [default]
2. Back to Pre-requisite summary dialog

h. Help
b. Back to the previous menu
q. Quit
--------------------------------------------------------------------------------
Please type a selection or press "Enter" to accept default choice [1]

 

[dimosaaaa]

i use ubuntu 12.04 LTS

 

[salgerman]

That looks a bit complicated, I thought installing fortran (or any other package) would have been a matter of

​

sudo apt-get install gfortran
at the command line, and that is it, it would taken care of just about everytying and pre-requisites.

Did you consult the Ubuntu pages for advice on installing compilers at all?