If you install the plugin version of the Aptana Studio IDE on an existing installation of eclipse done by the official ubuntu repository, the installation procedure may not work. To solve this problem you must install a few packages through the command line or through Synaptic.
The packages you need to complete the installation of the plugin are:
1 2 3
So, the command you should use is:
After this you can continue the installation. When the installer tells you that there may be software from unsafe software sources, answer yes to finish the installation. At the end you should restart Eclipse and you’re done!