How to change Hostname in Oracle Cloud Infrastructure (OCI) private Instance on Oracle Linux Server 7

The Following steps in order to change hostname in OCI private Instance on Linux 7:-

Step 1:  At First, we need to update the /etc/hostname:

Ø  hostnamectl set-hostname <host new name>

Step 2:  Update the OCI configuration file :- change PRESERVER_HOSTINFO=2

             Ø    vi  /etc/oci-hostname.conf

Step 3: Update  the FQDN from OCI console GUI

Go to Compute->Instance-> Attached VNICs

      As given below edit the attached VNICs and change the hostname to update FQDN.

   

Note:-  VNIC  <name> and <hostname>  should be same otherwise you will not be able to login.

   Step 4: Update the /etc/hosts file

[root@private-instance ~]# vi /etc/hosts 127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6 10.110.9.1 private-instance.sub00100830273.privatevcn.oraclevcn.com private-instance

 

Step 5: Reboot the Instance and verify the hostname.