Set Hostname2023/11/10

	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: cc702c1189b2478980465af429b275d5
             Boot ID: 2331caa591ac48c788742e972494bbe3
      Virtualization: kvm
    Operating System: Fedora Linux 39 (Server Edition)
         CPE OS Name: cpe:/o:fedoraproject:fedora:39
      OS Support End: Tue 2024-05-14
OS Support Remaining: 6month 3d
              Kernel: Linux 6.5.9-300.fc39.x86_64
        Architecture: x86-64
     Hardware Vendor: Red Hat
      Hardware Model: KVM
    Firmware Version: 1.16.1-1.el9
       Firmware Date: Tue 2014-04-01
        Firmware Age: 9y 7month 1w 2d

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