cannot load such file -- io/console (LoadError)

rails new sample
して、下記のようなエラーが出た場合。

/usr/share/ruby/vendor_ruby/2.0/rubygems/core_ext/kernel_require.rb:126:in 'require': cannot load such file -- io/console (LoadError)

io-consoleをインストールします。
[ec2-user@ip-***-***-***-*** ~]$ gem install io-console
Fetching: io-console-0.4.2.gem (100%)
Building native extensions. This could take a while...
Successfully installed io-console-0.4.2
Parsing documentation for io-console-0.4.2
Installing ri documentation for io-console-0.4.2
Done installing documentation for io-console after 0 seconds
1 gem installed

[ec2-user@ip-***-***-***-*** ~]$ rails new sample
create（以下略

できました