This article show to change hostname in linux CentOS 7 and Ubuntu 18 :
Change hostname on linux Centos 7.7 :
# hostnamectl set-hostname centos77.linodelinux.com
# hostnamectl hostnamectl Static hostname: centos77.linodelinux.com Icon name: computer-vm Chassis: vm Machine ID: 341e401e827641bda8eac222c3988c65 Boot ID: 0d2752d42a6a4325aa07f8d92162b852 Virtualization: vmware Operating System: CentOS Linux 7 (Core) CPE OS Name: cpe:/o:centos:centos:7 Kernel: Linux 3.10.0-957.27.2.el7.x86_64 Architecture: x86-64
Change hostname on linux Ubuntu 18 :
# hostnamectl Static hostname: hostname.linodelinux.com Icon name: computer-vm Chassis: vm Machine ID: 4bcc54714f99a80731bcef0157694ff4 Boot ID: 697aaea6db184654a57ac7636523ba4b Virtualization: vmware Operating System: Ubuntu 18.04.4 LTS Kernel: Linux 4.15.0-91-generic Architecture: x86-64
# hostnamectl set-hostname ubuntu18.linodelinux.com
# hostnamectl Static hostname: ubuntu18.linodelinux.com Icon name: computer-vm Chassis: vm Machine ID: 4bcc54714f99a80731bcef0157694ff4 Boot ID: 697aaea6db184654a57ac7636523ba4b Virtualization: vmware Operating System: Ubuntu 18.04.4 LTS Kernel: Linux 4.15.0-91-generic Architecture: x86-64