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I would like the hostname command to show the fqdn by default on CentOS Linux. What must be done to get this behavior? I am not looking to alias hostname to 'hostname --fqdn' I am looking to modify the system in a way that the gethostbyname calls, or whatever is used to get hostname get the entire fqdn ala host.example.bar.

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Add the FQDN hostname to /etc/sysconfig/network:

HOSTNAME=host.example.bar

After a system restart the hostname command (without any options) should display the FQDN.

[user@host ~]# hostname
host.example.bar

This works on CentOS 5/6.

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  • Maybe I was just missing the restart then. Thanks I will try it. – Gregg Leventhal Oct 1 '14 at 18:50
  • That was it. How silly of me, I am just so rarely required to reboot. I assume there is a way to do this without rebooting. That would be nice to know how to do. service hostname doesn't seem to exist, perhaps network service restart? – Gregg Leventhal Oct 1 '14 at 18:52

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