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Older versions of RoR

Running other version of Rails than is installed by default is possible, but you have to install it on your own in RVM. After you log in to the shell, go to the applications catalogue and switch to applications gemset.

rmv gemset use nazwa_aplikacji

Command

gem list

will get you to the list of installed gems. Uninstall existing Rails and Rack

gem uninstall nazwa_gema

and install your own versions

gem install rails -v wersja

nOTE: Uninstalling the newer version of Rack is very important.

Restart an app

appctl restart nazwa_aplikacji