Set Hostname2019/11/12

	If you would like to change Host Name of your System, set like follows.
[1]	Change hostname. (but when System restarted, it will be back).

# show current hostname

[root@localhost ~]#

hostname

localhost.localdomain

# change hostname

[root@localhost ~]#

hostname dlp.srv.world

[root@localhost ~]#

hostname

dlp.srv.world

# changed

[2]	Change hostname permanently.

[root@localhost ~]#

hostnamectl set-hostname dlp.srv.world

# show settings

[root@localhost ~]#

hostnamectl

   Static hostname: dlp.srv.world
         Icon name: computer-vm
           Chassis: vm
        Machine ID: bddd0d03ae944d118449a7e0d7bbca15
           Boot ID: 31794537cfd94df0ae5da30ed72fbe23
    Virtualization: kvm
  Operating System: Fedora 31 (Server Edition)
       CPE OS Name: cpe:/o:fedoraproject:fedora:31
            Kernel: Linux 5.3.7-301.fc31.x86_64
      Architecture: x86-64

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