Set Hostname2018/04/27

	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

# show settings

root@ubuntu:~#

hostnamectl

   Static hostname: dlp.srv.world
         Icon name: computer-vm
           Chassis: vm
        Machine ID: a43e325510b847a9a01fb91918762b5d
           Boot ID: a37695be64a243748f4d5ffdab64d89c
    Virtualization: kvm
  Operating System: Ubuntu 18.04 LTS
            Kernel: Linux 4.15.0-20-generic
      Architecture: x86-64

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