Question

gem install heroku failed with following message and I have tried the solution here, but it failed also. Is there any other way I can install Heroku?

WARNING: RubyGems 1.2+ index not found for: http://gems.rubyforge.org/

RubyGems will revert to legacy indexes degrading performance.   
ERROR: could not find gem heroku locally or in a repository.

Answer 1

Updating the gem to version 1.3.6 seem solve the problem.

However, gem update --system does not work on Ubuntu platforms, and apt-get install rubygems1.8 always bring you to version 1.2.0.

Here is the trick to update your gems to latest one,1.3.6, by the time of writing:

sudo gem install rubygems-update
sudo update_rubygems

And the credit goes here.

Finally, by all means avoid installing the gems manually, my experience taught me.