Change hostname in OEL 7

Method 1 :  nmtui  tool on terminal

Method 2 : [root@EDB-LEB-4-53 ~]# hostnamectl status
Static hostname: EDB-LEB-4-53.ace-ins.com
Icon name: computer-vm
Chassis: vm
Machine ID: 11cc4d26c75c476db3fa89a66a0fcae9
Boot ID: afc4b181973e40b9ab46ca774e6130c4
Virtualization: vmware
Operating System: Oracle Linux Server 7.0
CPE OS Name: cpe:/o:oracle:oracle_linux:7.0:GA:server
Kernel: Linux 3.8.13-35.3.1.el7uek.x86_64
Architecture: x86_64

[root@EDB-LEB-4-53 ~]# hostnamectl set-hostname ezylebuatdb.damana.com
[root@EDB-LEB-4-53 ~]# hostnamectl status
Static hostname: ezylebuatdb.damana.com
Icon name: computer-vm
Chassis: vm
Machine ID: 11cc4d26c75c476db3fa89a66a0fcae9
Boot ID: afc4b181973e40b9ab46ca774e6130c4
Virtualization: vmware
Operating System: Oracle Linux Server 7.0
CPE OS Name: cpe:/o:oracle:oracle_linux:7.0:GA:server
Kernel: Linux 3.8.13-35.3.1.el7uek.x86_64
Architecture: x86_64