How to Change Hostname in Oracle Cloud Infrastructure (OCI) Compute Environment on Oracle Linux Permanently
I wanted to change the host name for OCI Compute VM. I have below method to change the same
For Oracle Linux previous to version 7
Steps:
1: Edit /etc/sysconfig/network
change the parameter value for "hostname"
# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=funebs-ol6 <--------- change here
2: In the file /etc/oci-hostname.conf change the value of PRESERVE_HOSTINFO to 2.
/etc/oci-hostname.conf
PRESERVE_HOSTINFO=2
This change will be persistent across reboots.
For Oracle Linux 7 and later versions
Steps:
1: Update the /etc/hostname file with below command.
hostnamectl set-hostname <new name>
2: Edit the oci configuration file for hostnames as given below to update the needed value to 2.
vi /etc/oci-hostname.conf
PRESERVE_HOSTINFO=2
save the changes.
3: Edit the FQDN from OCI console GUI
a) Go to compute instances --> select the instance --> scroll down --> at the left bottom corner select attached VNIC under resources
b) Edit appropriate VNIC
c) Change hostname to update FQDN--> update VNIC click save changes.
4: Reboot the instance
5: Check the hostname with hostname command.
6: Check if FQDN is resolving.
host <ip address>
or
nslookup <ip address>
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