Google Compute Engine: how to set hostname permanently?

Question

How do I set the hostname of an instance in GCE permanently? I can set it via hostname,but after reboot it is gone again.

I tried to feed in metadata (hostname:f.q.d

Answer 1

Edit rc.local

sudo nano /etc/rc.local 

Add your line under the rest:

hostname *your.hostname.com*

Make sure to run the following after for the script to be executed

chmod +x /etc/rc.d/rc.local

Reboot, and profit.