Fedora 37
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Set Hostname2022/11/16

If you would like to change Host Name of your System, set like follows.
[1] Change hostname. (but when System restarted, it will be back)
# show current hostname

[root@localhost ~]#
# change hostnameć›´

[root@localhost ~]#
hostname dlp.srv.world

[root@localhost ~]#
# changed

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

[root@localhost ~]#
 Static hostname: dlp.srv.world
       Icon name: computer-vm
         Chassis: vm 
      Machine ID: d1821c5650734ea89d9c76eaa700b53d
         Boot ID: 533a1892478f48d28cf5cfd860df02d0
  Virtualization: kvm
Operating System: Fedora Linux 37 (Server Edition)
     CPE OS Name: cpe:/o:fedoraproject:fedora:37
          Kernel: Linux 6.0.7-301.fc37.x86_64
    Architecture: x86-64
 Hardware Vendor: Red Hat
  Hardware Model: KVM
Firmware Version: 1.15.0-1.el9
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