Set Hostname2023/04/24

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

# show current hostname

root@ubuntu:~#

hostname

ubuntu

# change hostname

root@ubuntu:~#

hostname dlp

root@ubuntu:~#

hostname

dlp

# just changed

[2]	Change hostname permanently.

root@ubuntu:~#

hostnamectl set-hostname dlp.srv.world

# show settings

root@ubuntu:~#

hostnamectl

 Static hostname: dlp.srv.world
       Icon name: computer-vm
         Chassis: vm
      Machine ID: 1e57a3007e1e4955844d5f4162a7ac9e
         Boot ID: 7c94775acd534be1a3bf28327718bb6c
  Virtualization: kvm
Operating System: Ubuntu 23.04
          Kernel: Linux 6.2.0-20-generic
    Architecture: x86-64
 Hardware Vendor: Red Hat
  Hardware Model: KVM
Firmware Version: 1.16.0-4.el9

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