Grateful for the feedback.
Just insert this line into the terminal or would you have any more commands?

   I am a new Linux user and became aware of OpenModelica.
  I thought it was interesting.
  However, I noticed that in the current version the examples mostly do not work.
  The last one that works and i have news is version 1.9.5.
  Could someone teach a step by step to install this version on Ubuntu via terminal?

  Grateful.