Ubuntu 22.04
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Set Hostname2022/04/26

 
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:~#
ubuntu
# change hostname

root@ubuntu:~#
root@ubuntu:~#
dlp    
# just changed

[2] Change hostname permanently.
root@ubuntu:~#
hostnamectl set-hostname dlp.srv.world
# show settings

root@ubuntu:~#
 Static hostname: dlp.srv.world
       Icon name: computer-vm
         Chassis: vm
      Machine ID: 73bbfaf5e3cd467082d8f6731752bfb2
         Boot ID: 7c1e054702b74d7f977ced4b94bfabe2
  Virtualization: kvm
Operating System: Ubuntu 22.04 LTS
          Kernel: Linux 5.15.0-25-generic
    Architecture: x86-64
 Hardware Vendor: Red Hat
  Hardware Model: KVM
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