Ruby-on-rails – ruby in linux: permanently “source .rvm/scripts/rvm”

I'm new to Ruby on Rails and have just set it up in Ubuntu Linux following instructions I found here. Specifically,

As s.m. said, I uninstalled everything, then I opened another terminal session as a normal user and run:

bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)
then i run source /home/my-desktop-username/.rvm/scripts/rvm as a normal user NOT ROOT

then i run rvm requirements as a normal user. Then I copy the requirements and close the session, open a root session and install the requirements using sudo

Then I close the session and open a normal user session and run rvm install ruby-1.9.3-p125 if you run this command as root, it will say that rvm is not installed and will suggest that you install it using sudo apt-get install rvm Don't do that!

So basically I had two problems, the tutorials that i followed didn't say that i should run

source /home/my-desktop-username/.rvm/scripts/rvm and didn't say that I should not run rvm as root, s.m told me that. Thanks to everyone, especially to s.m

That works well, but I will have to remember to

source .rvm/scripts/rvm

every time I open a terminal to work with Ruby on Rails.

Is there a way to permanently tell Ubuntu to look in .rvm for all the Ruby stuff?