rbenv install - executable host ruby is required

Question

I am trying to install ruby 2.2.0-dev using rbenv into my Ubuntu 13.10 development laptop. I have removed all previous ruby and gem installations. Now, when I try to install rub

Answer 1

tl;dr

you need a non-dev version (i.e. 2.2.0) installed (also using rbenv) before you can have the dev version.

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As of rbenv 1.0.0 you don't need to have ruby from the repository (e.g. using apt-get) installed on your machine to be have any *-dev version installed. However, it is required to have a non-dev version already installed (through rbenv) before installing any *-dev version.

Answer 2

You can't use rbenv without a native installation of ruby in the machine. You should install ubuntu's ruby (sudo apt-get install ruby) so rbenv will have a base version to work with. If you can run ruby -v then you're all set.