If your problem is to run binaries of a certain version, then:

rails --version # => the latest version rails _2.3.10_ --version # => Rails 2.3.10 

This pattern (gem-binary _gem-version_) works for any gem binary.

Hope it helps.

If your problem is to run binaries of a certain version, then:

rails --version # => the latest version rails _2.3.10_ --version # => Rails 2.3.10 

This pattern (gem-binary _gem-version_) works for any gem binary.