** Also affects: gnome-control-center (Ubuntu Bionic)
Importance: Low
Status: New
** Changed in: gnome-control-center (Ubuntu Bionic)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1766575
Title:
Drop libnss-myhostname recommends
Status in gnome-control-center package in Ubuntu:
Fix Committed
Status in gnome-control-center source package in Bionic:
Fix Committed
Bug description:
gnome-control-center added a Recommends: libnss-myhostname years ago
so that it was possible to easily change the hostname in the Details
panel. That dependency no longer appears to be needed since we
switched to systemd-resolved.
Testing Done
============
In both Debian Testing and Ubuntu 18.04 (Debian doesn't use systemd-resolved
so seemed useful to try there too).
sudo apt uninstall libnss-myhostname
Restart
Open the GNOME Settings app (gnome-control-center)
In the left sidebar, click Devices
Enter a different Device name in the block
Open a terminal and verify that the hostname has been changed.
In Debian, running `ping new-hostname` fails, but it works fine in
Ubuntu.
Other Info
==========
There are concerns about having libnss-myhostname in the default install. See
comment 5 at LP: #1741277.
See also LP: #1162475
Note that /etc/hosts isn't updated regardless of whether libnss-myhostname is
installed (I guess my bug description there was wrong but there was some kind
of bug there.)
Regression Potential
====================
To quote from the manpage:
https://manpages.debian.org/unstable/nss-resolve
"Note that systemd-resolved will synthesize DNS resource records in a
few cases, for example for "localhost" and the current hostname, see
systemd-resolved(8) for the full list. This duplicates the
functionality of nss-myhostname(8), but it is still recommended (see
examples below) to keep nss-myhostname configured in
/etc/nsswitch.conf, to keep those names resolveable if systemd-
resolved is not running."
Ubuntu uses systemd-resolved by default and it's expected that users
who don't want to use that will need to configure some things
manually.
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