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With Fedora 18 the hostname is stored in the file /etc/hostname. During the boot process the transient hostname will be set from systemd according to the content of the file /etc/hostname. The commands hostname and hostnamectl may be used to print or set the system hostname. On Fedora the system hostname is specified as a fully qualified domain name (FQDN).

How to change the hostname

The following command changes the transient and static hostname: 

hostnamectl set-hostname myhost.mydomain

Documentation

man hostnamectl
man hostname
man 5 hostname
man machine-info
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