$ sudo gem install rubygems-update -v 1.5.3 Fetching: rubygems-update-1.5.3.gem (100%) Successfully installed rubygems-update-1.5.3 1 gem installed Installing ri documentation for rubygems-update-1.5.3... Installing RDoc documentation for rubygems-update-1.5.3... $ sudo gem uninstall rubygems-update Select gem to uninstall: 1\. rubygems-update-1.5.3 2\. rubygems-update-1.8.13 3\. All versions \> 2 Successfully uninstalled rubygems-update-1.8.13 $ sudo update_rubygems RubyGems 1.5.3 installed === 1.5.3 / 2011-02-26 NOTE: RubyGems 1.5.0 and 1.5.1 have a broken <tt>gem update --system</tt>. To upgrade you'll need to use the manual upgrade recipe. Using sudo/su as appropriate: $ gem install rubygems-update $ update_rubygems Bug Fixes: \* Fix for a bug in Syck which causes install failures for gems packaged with Psych. Bug #28965 by Aaron Patterson. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- RubyGems installed the following executables: /usr/bin/gem1.8