# gem install mongo
Exception `NameError' at /usr/lib/ruby/1.8/rubygems/command_manager.rb:164 - uninitialized constant Gem::Commands::InstallCommand
Exception `Gem::LoadError' at /usr/lib/ruby/1.8/rubygems.rb:779 - Could not find RubyGem test-unit (>= 0)

Exception `Gem::LoadError' at /usr/lib/ruby/1.8/rubygems.rb:779 - Could not find RubyGem sources (> 0.0.1)

Exception `Errno::EEXIST' at /usr/lib/ruby/1.8/fileutils.rb:243 - File exists - /root/.gem/specs/rubygems.org%80
Exception `Errno::EEXIST' at /usr/lib/ruby/1.8/fileutils.rb:243 - File exists - /root/.gem/specs/rubygems.org%80
Exception `IOError' at /usr/lib/ruby/1.8/rubygems/format.rb:50 - closed stream
Exception `Errno::EEXIST' at /usr/lib/ruby/1.8/fileutils.rb:243 - File exists - /var/lib/gems/1.8
Exception `NoMethodError' at /usr/lib/ruby/1.8/rubygems/requirement.rb:134 - undefined method `call' for nil:NilClass
ERROR:  While executing gem ... (NoMethodError)
    undefined method `call' for nil:NilClass
	/usr/lib/ruby/1.8/rubygems/requirement.rb:134:in `satisfied_by?'
	/usr/lib/ruby/1.8/fileutils.rb:243:in `all?'
	/usr/lib/ruby/1.8/rubygems/requirement.rb:134:in `each'
	/usr/lib/ruby/1.8/rubygems/requirement.rb:134:in `all?'
	/usr/lib/ruby/1.8/rubygems/requirement.rb:134:in `satisfied_by?'
	/usr/lib/ruby/1.8/rubygems/source_index.rb:325:in `search'
	/usr/lib/ruby/1.8/rubygems/source_index.rb:323:in `select'
	/usr/lib/ruby/1.8/rubygems/source_index.rb:323:in `search'
	/usr/lib/ruby/1.8/rubygems/source_index.rb:280:in `find_name'
	/usr/lib/ruby/1.8/rubygems/installer.rb:243:in `installation_satisfies_dependency?'
	/usr/lib/ruby/1.8/rubygems/installer.rb:232:in `ensure_dependency'
	/usr/lib/ruby/1.8/rubygems/installer.rb:181:in `install'
	/usr/lib/ruby/1.8/rubygems/installer.rb:180:in `each'
	/usr/lib/ruby/1.8/rubygems/installer.rb:180:in `install'
	/usr/lib/ruby/1.8/rubygems/dependency_installer.rb:277:in `install'
	/usr/lib/ruby/1.8/rubygems/dependency_installer.rb:247:in `each'
	/usr/lib/ruby/1.8/rubygems/dependency_installer.rb:247:in `install'
	/usr/lib/ruby/1.8/rubygems/commands/install_command.rb:119:in `execute'
	/usr/lib/ruby/1.8/rubygems/commands/install_command.rb:116:in `each'
	/usr/lib/ruby/1.8/rubygems/commands/install_command.rb:116:in `execute'
	/usr/lib/ruby/1.8/rubygems/command.rb:270:in `invoke'
	/usr/lib/ruby/1.8/rubygems/command_manager.rb:134:in `process_args'
	/usr/lib/ruby/1.8/rubygems/command_manager.rb:104:in `run'
	/usr/lib/ruby/1.8/rubygems/gem_runner.rb:58:in `run'
	/usr/bin/gem:21

# gem install bson_ext --debug
Exception `NameError' at /usr/lib/ruby/1.8/rubygems/command_manager.rb:164 - uninitialized constant Gem::Commands::InstallCommand
Exception `Gem::LoadError' at /usr/lib/ruby/1.8/rubygems.rb:779 - Could not find RubyGem test-unit (>= 0)

Exception `Gem::LoadError' at /usr/lib/ruby/1.8/rubygems.rb:779 - Could not find RubyGem sources (> 0.0.1)

Exception `Errno::EEXIST' at /usr/lib/ruby/1.8/fileutils.rb:243 - File exists - /root/.gem/specs/rubygems.org%80
Exception `Errno::EEXIST' at /usr/lib/ruby/1.8/fileutils.rb:243 - File exists - /root/.gem/specs/rubygems.org%80
Exception `IOError' at /usr/lib/ruby/1.8/rubygems/format.rb:50 - closed stream
Exception `Errno::EEXIST' at /usr/lib/ruby/1.8/fileutils.rb:243 - File exists - /var/lib/gems/1.8
Exception `NoMethodError' at /usr/lib/ruby/1.8/rubygems/requirement.rb:134 - undefined method `call' for nil:NilClass
ERROR:  While executing gem ... (NoMethodError)
    undefined method `call' for nil:NilClass
	/usr/lib/ruby/1.8/rubygems/requirement.rb:134:in `satisfied_by?'
	/usr/lib/ruby/1.8/fileutils.rb:243:in `all?'
	/usr/lib/ruby/1.8/rubygems/requirement.rb:134:in `each'
	/usr/lib/ruby/1.8/rubygems/requirement.rb:134:in `all?'
	/usr/lib/ruby/1.8/rubygems/requirement.rb:134:in `satisfied_by?'
	/usr/lib/ruby/1.8/rubygems/source_index.rb:325:in `search'
	/usr/lib/ruby/1.8/rubygems/source_index.rb:323:in `select'
	/usr/lib/ruby/1.8/rubygems/source_index.rb:323:in `search'
	/usr/lib/ruby/1.8/rubygems/source_index.rb:280:in `find_name'
	/usr/lib/ruby/1.8/rubygems/installer.rb:243:in `installation_satisfies_dependency?'
	/usr/lib/ruby/1.8/rubygems/installer.rb:232:in `ensure_dependency'
	/usr/lib/ruby/1.8/rubygems/installer.rb:181:in `install'
	/usr/lib/ruby/1.8/rubygems/installer.rb:180:in `each'
	/usr/lib/ruby/1.8/rubygems/installer.rb:180:in `install'
	/usr/lib/ruby/1.8/rubygems/dependency_installer.rb:277:in `install'
	/usr/lib/ruby/1.8/rubygems/dependency_installer.rb:247:in `each'
	/usr/lib/ruby/1.8/rubygems/dependency_installer.rb:247:in `install'
	/usr/lib/ruby/1.8/rubygems/commands/install_command.rb:119:in `execute'
	/usr/lib/ruby/1.8/rubygems/commands/install_command.rb:116:in `each'
	/usr/lib/ruby/1.8/rubygems/commands/install_command.rb:116:in `execute'
	/usr/lib/ruby/1.8/rubygems/command.rb:270:in `invoke'
	/usr/lib/ruby/1.8/rubygems/command_manager.rb:134:in `process_args'
	/usr/lib/ruby/1.8/rubygems/command_manager.rb:104:in `run'
	/usr/lib/ruby/1.8/rubygems/gem_runner.rb:58:in `run'
	/usr/bin/gem:21