[Bug 1764172] Re: Unable to change hostname from the one specified during Bionic server installation

[Nathan Stratton Treadway]

Presumably the ideal solution would be for Subiquity to hand off to
cloud-init in a manner that really only ran on that very first boot of
the new system.

However, assuming that a true fix to that situation is too invasive to
be included into Bionic at this point, it seems like it might be a good
idea to at least mention the issue (and recommended workaround) in the
Bionic release notes.

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https://bugs.launchpad.net/bugs/1764172

Title:
  Unable to change hostname from the one specified during Bionic server
  installation

Status in Release Notes for Ubuntu:
  New
Status in hostname package in Ubuntu:
  Confirmed
Status in subiquity package in Ubuntu:
  New

Bug description:
  In Bionic Beta 2 I am not able on a host or in a guest VM to change
  the hostname of a Bionic Beta 2 installation by changing
  /etc/hostname. The name in the file can be changed but it always
  reverts to the hostname configured during installation.

  In the following thread on the topic it is suggested to remove a
  number of cloud packages. When doing this in a VM install I could
  change the hostname again via /etc/hostname.

  https://ubuntuforums.org/showthread.php?t=2389098&page=2

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