If you are using CPanel 11 (the latest version available at this time) you can easily install ruby on your system using CPanel. Previously, you had to do this using operating system packages or manually from sources. Now, we can just run /scripts/installruby and this will do everything for us:

• download, compile and install ruby
• download and install RubyGems and some gems like rails and mongrel

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Once you have prepared your system as shown in my previous post “Preparing for CPanel 11” you can now safely proceed with the actual CPanel upgrade. This is done as any regular CPanel upgrade:
- you can run from the command line upcp:

/scripts/upcp

- or from inside WHM you run https://Server_IP_or_Hostname:2087/scripts2/upcpform

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