I have tested the following method on 32-bit Ubuntu 18.04 LTS:
cd ~/Downloads
wget http://download1.rstudio.org/rstudio-0.97.551-i386.deb
sudo apt install ./rstudio-0.97.551-i386.deb
rstudio
It really does not start and shows the following error message:
$ rstudio
rstudio: error while loading shared libraries: libgstapp-0.10.so.0: cannot open shared object file: No such file or directory
and the mentioned file was available only for previous Ubuntu 16.04 LTS.
So we need to install it manually by downloading two packages:
cd ~/Downloads
wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gstreamer0.10/libgstreamer0.10-0_0.10.36-1.5ubuntu1_i386.deb
wget http://security.ubuntu.com/ubuntu/pool/universe/g/gst-plugins-base0.10/libgstreamer-plugins-base0.10-0_0.10.36-2ubuntu0.2_i386.deb
sudo apt install ./libgstreamer*.deb
And then it will complain about missed libpng12. I suppose that it is a bad idea to install it manually.
But we can use newer version of RStudio as follows:
cd ~/Downloads
wget http://download1.rstudio.org/rstudio-1.1.463-i386.deb
sudo apt install ./rstudio-1.1.463-i386.deb
and use it without problems:
