Fedora 29
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Set Hostname2018/11/01

This is the example for setting Hostname of your system.
[1] Change hostname. (but if system restarted, it will be back).
# show current hostname

[root@localhost ~]#
# change hostname

[root@localhost ~]#
hostname dlp.srv.world

[root@localhost ~]#
# just changed

[2] Change hostname permanently.
[root@localhost ~]#
hostnamectl set-hostname dlp.srv.world
# show state

[root@localhost ~]#
   Static hostname: dlp.srv.world
         Icon name: computer-vm
           Chassis: vm
        Machine ID: a876222710d94ce6b27f0a5e8cc31d17
           Boot ID: 5bde0dd8a9aa4489a7965a3f7a1565ac
    Virtualization: kvm
  Operating System: Fedora 29 (Server Edition)
       CPE OS Name: cpe:/o:fedoraproject:fedora:29
            Kernel: Linux 4.18.16-300.fc29.x86_64
      Architecture: x86-64
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