Cannot install ruby version on redhat

I have the following problem and whatever I try, nothing helps. I hope someone could help me with this.

I have a redhat server and I’m trying to install redmine on it. Redmine needs Ruby >= 1.8.7 to run so I installed it and when I execute ruby -v in the console it says I have version 1.8.7 (so that’s great)

[root@vms redmine]# ruby -v
ruby 1.8.7 (2008-05-31 patchlevel 0) [x86_64-linux]

But when i try to install the passenger gem I need to run redmine on Apache it says I don’t have ruby 1.8.7

[root@vms redmine]# gem install passenger
ERROR:  Error installing passenger:
rake requires Ruby version >= 1.8.6

Does anyone know how this can be fixed?

Answer

You need newer ruby, you have patchlevel 0, try to get patchlevel 173 at least.
RVM can help you.

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Answer