Change Hostname Amazon Linux

Here’s how to make a hostname stick on Amazon Linux.

Set preserve_hostname to true in /etc/cloud/cloud.cfg.

preserve_hostname: true

Set the hostname in /etc/sysconfig/network.

HOSTNAME=server.domain.com
NETWORKING=yes
NOZEROCONF=yes

Reboot the server to make sure hostname sticks after a reboot.

shutdown -r now