AWS instance after machine hostname change, the server loose connection after while

Question

Hi all,

OS: SLES15
Server: EC2 with Load Balancer and Auto Scaling

After changing the hostname as "sudo hostnamectl set-hostname webserver.mydomain.com", the server loose connection after a while.

Any ideas how to make it stable? Thank you

Answer

Hostname can be made permanent with below steps:

1. Set hostname
$ sudo hostnamectl set-hostname new-hostname

$ sudo vi /etc/hosts

Find the localhost string and append the new hostname.

127.0.0.1   localhost   webserver.mydomain.com

Save and exit

2. Confirm the change in hostname:

$ hostnamectl

Please refer: https://repost.aws/knowledge-center/linux-static-hostname-suse

Relevanter Inhalt