If you're using another Linux distribution, perform a web search for something like «change hostname on [name of Linux distribution]». (howtogeek.com)
This descriptive metadata provides information including hostname, resource type (Globus, Condor) and the remote brokering system (Portable Batch System, Sun Grid Engine, Condor, etc.) which the system can then use to manage job submissions. (link.springer.com)
Your computer uses DNS servers to resolve hostnames to IP addresses, and these queries are temporarily stored in your DNS cache. (howtogeek.com)