How to update the AWS EC2 hostname without reboot

amazon ec2amazon-web-serviceshostname

I know that to update the hostname of an AWS EC2 instance, I have to update /etc/sysconfig/network and then do a reboot.

But I need to do it without the reboot, is there a way to do this? I know that in some Linux distributions, you just need to source certain files to do this, but I cannot find what needs to be sourced in case of Amazon Linux.

Also, the updated hostname should be persistent, as in it should stay after restarts.

Thanks.

Best Answer

You can also edit /etc/hostname to have the desired hostname, and then run

hostname -F /etc/hostname

to apply the hostname from that file to the system.

See hostname --help for more options.

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