I recently tried changing an Ubuntu machine hostname.
After a reboot, I found the name was reverted to it's previous one.
A quick search suggested this was happening because of cloud-init.
If I change the setting preserve_hostname
to true
, the hostname will persist.
However I found that system updates can possible cause the setting to revert back to false
resulting in the hostname reverting as well.
I would like to know if it is possible to change the hostname permanently without any change to cloud-init settings. In other words, where does cloud-init save the original hostname and how to change it?
Best Answer
Write something like below, change the permission so content will be persistent.
Other way will be make your host file immutable after first time creation.