-`Ubuntu <http://www.ubuntu.com/>`_ is a distribution ('distro') of GNU/Linux.
-Its latest LTS release is
-`12.04 (a.k.a. Precise Pangolin) <https://help.ubuntu.com/12.04/ubuntu-help/>`_
-and was published on April, 2012.
-For this OS, the complete list of steps is available
+`Ubuntu <http://www.ubuntu.com/>`_ and `Debian <http://www.debian.org/>`_
+are distributions ('distros') of GNU/Linux (a.k.a. Linux).
+ Ubuntu is Debian-based thus they share much code and packages.
+**For these OSs, the complete list of steps is available**
(and has been thoroughly checked), including ODE's compilation and
installation, which are the major obstacles in the process and may scare
users unaccustomed to the command line and software compilation.
+Ubuntu's latest long-term-support release is
+`12.04 (a.k.a. Precise Pangolin) <https://help.ubuntu.com/12.04/ubuntu-help/>`_
+and was published on April, 2012.
Run the following commands in sequence and you'll have ARS ready to go.
They are grouped as: a) Python basic packages, b) VTK, c) ODE, d) ARS::
Not all users will need to run ``ldconfig`` but it doesn't hurt if you do.
See :ref:`ODE Import Error<ode_import_error>` for more information.
+Debian's next stable version is
+`7 (a.k.a. Wheezy) <http://www.debian.org/releases/wheezy/>`_
+and is about to be released in the first half of 2013. Debian
+`6 (a.k.a. Squeeze) <http://www.debian.org/releases/squeeze/>`_
+had old versions of Python and VTK thus was not considered for these
+'easy install' instructions.
+The **required steps are identical** as those above, with one caveat:
+ Debian might not have ``sudo`` available or the OS user might not be in the
+ ``sudo`` group. The solution (you need the root user password)
+ adduser <username> sudo
+ and then logout and login again.
+ An alternative is to replace ``sudo <command>`` with ``su -c '<command>'``.