[root@ip-10-251-90-191:~] update_rubygems
/usr/lib/ruby/site_ruby/1.8/rubygems.rb:578:in `report_activate_error': Could not find RubyGem gemcutter (>= 0.2.1) (Gem::LoadError)
	from /usr/lib/ruby/site_ruby/1.8/rubygems.rb:134:in `activate'
	from /usr/lib/ruby/site_ruby/1.8/rubygems.rb:158:in `activate'
	from /usr/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `each'
	from /usr/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `activate'
	from /usr/lib/ruby/site_ruby/1.8/rubygems.rb:158:in `activate'
	from /usr/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `each'
	from /usr/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `activate'
	from /usr/lib/ruby/site_ruby/1.8/rubygems.rb:49:in `gem'
	from /usr/bin/update_rubygems:18

[root@ip-10-251-90-191:~] gem i gemcutter
ERROR:  Error installing gemcutter:
	gemcutter requires RubyGems version >= 1.3.5