RVM 1.25.22 (stable) error on "rvm use"

Question

Got error like this:

MacRuby can only be installed on a Darwin OS.
macruby-0.12 is not installed.
To install do: 'rvm install macruby-0.12'

when trying to

rvm use

after

\curl -sSL https://get.rvm.io | bash -s stable

on fresh ubuntu 12.04. On my home pc and at one VPS. If I use

rvm use 2.1.1

directly, for example, its OK and I can use RVM. Still sometimes at scripting it makes some troubles. And writing rvm use... each time I open terminal window is annoying. What is that? Cant google anything related to macruby and ubuntu. Home PC is ubuntu 12.04. VPS was x86 as far as I remember. I tried to make fresh user and reinstall ubuntu, but its still there.

P.S. if I do

rvm install macruby-0.12

I got error like this, of cource

MacRuby can only be installed on a Darwin OS.
MacRuby can only be installed on a Darwin OS.
Searching for binary rubies, this might take some time.
No binary rubies available for: ubuntu/12.04/x86_64/macruby-0.12.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
RVM does not have prediction for required space for macruby-0.12, assuming 150MB should be enough, let us know if it was not.
MacRuby can only be installed on a Darwin OS.

P.S.S I tried /bin/bash --login etc Couple of moths before with older RVM (when each time i got message about .rvmrc deprecated) it was all OK, but once I had to upgrade...

Answer 1

for checking what ruby is being used run:

rvm current

as for rvm use, it's a but, you should get a help screen, the usage is:

rvm use ruby-version@gemset

where most of the components are optional, but at least one has to be given

Answer 2

I had exactly the same problem with multi-user rvm. This is what helped me:

rvm implode # uninstall the whole rvm

Then I installed rvm 1.25.27 and the problem was gone. Just upgrading rvm did not help.

user@host:~$ rvm use
Using /usr/local/rvm/gems/ruby-2.1.2