How to change gem package manager's version?

Question

Currently I am having gem package manager version 2.0.14, I found it by running

gem -v

but how to downgrade the package manager to version 1.8.25. Every search attempt to find this leads me to, how to upgrading or downgrading a particular gem.

Answer 1

Gem can be updated using:

gem update --system

or

sudo gem update --system

Answer 2

maybe you are referring to rvm?

rvm list
rvm use 2.0.0-p353 // just a sample version

Answer 3

This may help you:

sudo gem update --system 1.8.25  # If you don't mention version then by default it will update with latest one

More information about downgrading/upgrading rubygems: http://rubygems.rubyforge.org/rubygems-update/UPGRADING_rdoc.html