Changing hostnames is a common need and a common question we get in support. Hostname changes can often become problematic if not done correctly. Luckily, we have a top notch support team ready to help! In this case, support engineer Mallikarjuna Manoj Kandala has authored the following developerWorks article outlining this process for Rational ClearCase:
How to change the hostname in the IBM Rational ClearCase environment - Making the task easier. The IBM Rational ClearCase environment is sensitive to any hostname changes on the system where the application is hosted. This article provides the steps to make the task easier for Rational ClearCase administrators. This article shows how to make changes to various server components of the IBM® Rational® ClearCase® environment, when the hosted system hostname changes. The content in this article applies to Rational ClearCase v8.0.0.x and higher, and only UNIX and Linux systems.