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Set Hostname2019/01/15

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

localhost:~ #
# change hostname

localhost:~ #

localhost:~ #    
# just changed

[2] Change hostname permanently.
localhost:~ #
hostnamectl set-hostname
# show state

localhost:~ #
   Static hostname:
Transient hostname: dlp
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 461f05d189b247a2896c408d3c775f61
           Boot ID: 0e9f9eb8ad0e4df1a4e74510636662fd
    Virtualization: kvm
  Operating System: SUSE Linux Enterprise Server 15
       CPE OS Name: cpe:/o:suse:sles:15
            Kernel: Linux 4.12.14-25.25-default
      Architecture: x86-64
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