This bug was fixed in the package network-manager - 1.42.4-1ubuntu5
---------------
network-manager (1.42.4-1ubuntu5) mantic; urgency=medium
* d/network-manager.postinst: fix netplan migration logic.
The "continue" is being executed in a subshell so it's not skipping the
next commands. It will fail if Network Manager is not running. See LP:
#2022023
* d/network-manager.preinst: use /var/lib/NetworkManager for backups
/root is not a system directory so we shouldn't use it. It might not
even exist or the package manager might run in a sandbox and not have
access to it. See LP: #2021937
-- Danilo Egea Gondolfo <danilo.egea.gondo...@canonical.com> Thu, 01
Jun 2023 15:17:57 +0100
** Changed in: network-manager (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/2021937
Title:
preinst writes to /root
Status in network-manager package in Ubuntu:
Fix Released
Bug description:
As part of my sandboxed APT I noticed that the package failed to
install as it was trying to write to /root.
/root is a user directory, not a system one, which may not even exist
because the administrator changed it to like /home/root, for example,
and we definitely should not be writing system files in user
directories.
Preparing to unpack .../16-network-manager_1.42.4-1ubuntu4_amd64.deb ...
mkdir: cannot create directory ‘/root/NetworkManager.bak’: Read-only file
system
cp: cannot create directory
'/root/NetworkManager.bak/system-connections_1.42.4-1ubuntu2': No such file or
directory
dpkg: error processing archive
/tmp/apt-dpkg-install-x9x0Qo/16-network-manager_1.42.4-1ubuntu4_amd64.deb
(--unpack):
new network-manager package pre-installation script subprocess returned
error exit status 1
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