Set Hostname2019/04/23

	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: 73383a4430c945e5ae307ab7abf6f39b
           Boot ID: 208024e19de646f1be27f69a3ba70cf4
    Virtualization: kvm
  Operating System: Ubuntu 19.04
            Kernel: Linux 5.0.0-13-generic
      Architecture: x86-64

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