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[Bug 2067333] Re: hostnamectl --set-hostname doesn't update /etc/hosts

 

I’m seeing the same behavior on Ubuntu 24.04 and 25.04.

Hostname changes via GUI or `hostnamectl` don’t update `/etc/hosts`,
which leads to confusing issues.

I understand the suggested workaround is to use `libnss-myhostname`, but
adding a disclaimer or an automatic `/etc/hosts` update would improve
usability significantly, especially for desktop users.

Details and examples here:
https://anagogistis.com/posts/hostname-change/
https://anagogistis.com/posts/sudo-hang/

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https://bugs.launchpad.net/bugs/2067333

Title:
  hostnamectl --set-hostname doesn't update /etc/hosts

Status in systemd package in Ubuntu:
  Won't Fix

Bug description:
  hostnamectl is a System API that updates all important OS references
  to the hostname, so the operator does not need to know them.

  Having to manually update /etc/hosts defeats the purpose of having the
  System API & leaves the OS in an inconsistent state

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