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∴ rvm rubygems [version]Installs a specific rubygems version in the current ruby. If'current' is specified, the most current rubygems known to RVMwill be installed.Currently compatible with only MRI 1.8.*, 1.9.* and Ruby Enterprise Edition. If your system is not supported, running thecommand will generate an error message.MRI 1.9.* ships with a version of RubyGems. To revert to that versionafter installing a custom version via 'rvm rubygems' run 'rvm rubygems remove'.