Securing and Optimizing Linux: RedHat Edition -A Hands on Guide
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9.1. The /etc/HOSTNAME file

This file stores your system's host name, your system's fully qualified domain name -FQDN, such as deep.openna.com. Following is a sample /etc/HOSTNAME file: 


           deep.openna.com
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Files -Networking FunctionalityUpThe /etc/sysconfig/network-scripts/ifcfg-ethN files