우분투 리눅스 호스트네임 변경방법
root@currenthostnm:~# hostname
currenthostnm
root@currenthostnm:~# hostnamectl
Static hostname: currenthostnm
Icon name: computer-vm
Chassis: vm
Machine ID: 9ec36713addf9372a874d0f95a603092
Boot ID: 9d1b8e8e9f6b4b4190002d6f8af459ab
Virtualization: kvm
Operating System: Ubuntu 18.04.6 LTS
Kernel: Linux 4.15.0-159-generic
Architecture: x86-64
root@currenthostnm:~# hostnamectl set-hostname demoserver
root@currenthostnm:~# hostname
demoserver