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linger-users: allow disabling for bashless profile

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The linger-users systemd unit runs a Bash script.  To allow this to be
avoided for the bashless profile, provide an option to have NixOS not
manage lingering for any users.

To make this feasible, add the possibility for each individual user
account to not have its lingering configuration managed by NixOS at all,
and make this the default from 26.05.  In practice, this won't result in
a change of behaviour except for people who manually use `loginctl
enable-linger` commands to add lingering for some user accounts, then
rely on NixOS to disable lingering the next time the systemd units are
restarted.
This commit is contained in:
Adam Dinwoodie
2025-11-09 19:12:05 +00:00
parent 2130c0a63e
commit 531d3a9a45
3 changed files with 51 additions and 12 deletions
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nixos/doc/manual/release-notes/rl-2511.section.md
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@@ -379,6 +379,8 @@ and [release notes for v18](https://goteleport.com/docs/changelog/#1800-070325).
- In all other cases, you'll need to set this option to `true` yourself.
- `boot.isNspawnContainer` being `true` implies [](#opt-boot.isContainer) being `true`.
- `users.users.*.linger` now defaults to `null` rather than `false`, meaning NixOS will not attempt to enable or disable lingering for that user account. In practice, this is unlikely to make a difference for most people, as new users are created without lingering configured, but it means users who use `loginctl` commands to manage lingering imperatively will not have their changes overridden by default. There is a new, related option, `users.manageLingering`, which can be used to prevent NixOS attempting to manage lingering entirely.
- Due to [deprecation of gnome-session X11 support](https://blogs.gnome.org/alatiera/2025/06/08/the-x11-session-removal/), `services.desktopManager.pantheon` now defaults to pantheon-wayland session. The X11 session has been removed, see [this issue](https://github.com/elementary/session-settings/issues/91) for details.
- `bcachefs` file systems will now use the out-of-tree module for supported kernels. The in-tree module has been removed, and users will need to switch to kernels that support the out-of-tree module.