Bug#1016500: README.Debian documents KillUserProcesses but not Linger

[chrysn]

Package: systemd
Version: 251.3-1
Severity: normal
File: /usr/share/doc/systemd/README.Debian.gz

The README.Debian file duefully documents the surprising[1] effects that
happen when using tmux or similar under in a logind session. However, it
only covers the KillUserProcesses part of things (a mechanism that
Debian thankfully disables by default), and not the linger part, which
has a similar (if not the same) effect and is set to kill by default.

Suggested new text, based on the current one:

> KillUserProcesses and linger behavior in Debian
> ===============================================
> 
> If KillUserProcesses=yes is configured in logind.conf(5), the session scope
> will be terminated when the user logs out of that session.
>
> Likewise, processes launched by users configured as Linger=no (see
> loginctl(1)) are terminated.
> 
> See logind.conf(5):
> 
> | Note that setting KillUserProcesses=yes will break tools like screen(1) and
> | tmux(1), unless they are moved out of the session scope.
> 
> The default for KillUserProcesses in /etc/systemd/logind.conf is set
> to "yes" in upstream systemd, though Debian defaults to "no" (see #825394).
>
> The default Linger value for users is set to "no", and may need to be
> altered with `loginctl enable-linger ${USER}` to keep screen and tmux
> useful.

[1]: https://bugs.debian.org/1016475


-- Package-specific info:

-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.18.0-3-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages systemd depends on:
ii  adduser            3.123
ii  libacl1            2.3.1-1
ii  libaudit1          1:3.0.7-1+b1
ii  libblkid1          2.38-6
ii  libc6              2.33-8
ii  libcap2            1:2.44-1
ii  libcryptsetup12    2:2.5.0-1
ii  libfdisk1          2.38-6
ii  libgcrypt20        1.10.1-2
ii  libkmod2           30+20220630-3
ii  liblz4-1           1.9.3-2
ii  liblzma5           5.2.5-2.1
ii  libmount1          2.38-6
ii  libseccomp2        2.5.4-1+b1
ii  libselinux1        3.4-1+b1
ii  libssl3            3.0.5-1
ii  libsystemd-shared  251.3-1
ii  libsystemd0        251.3-1
ii  libzstd1           1.5.2+dfsg-1
ii  mount              2.38-6

Versions of packages systemd recommends:
ii  dbus [default-dbus-system-bus]  1.14.0-2
ii  ntpsec [time-daemon]            1.2.1+dfsg1-7+b1

Versions of packages systemd suggests:
ii  libfido2-1            1.11.0-1+b1
ii  libtss2-esys-3.0.2-0  3.2.0-1+b1
ii  libtss2-mu0           3.2.0-1+b1
ii  libtss2-rc0           3.2.0-1+b1
ii  policykit-1           0.105-33
pn  systemd-boot          <none>
ii  systemd-container     251.3-1
pn  systemd-homed         <none>
pn  systemd-userdbd       <none>

Versions of packages systemd is related to:
ii  dbus-user-session  1.14.0-2
pn  dracut             <none>
ii  initramfs-tools    0.142
pn  libnss-systemd     <none>
ii  libpam-systemd     251.3-1
ii  udev               251.3-1

-- no debconf information

-- 
To use raw power is to make yourself infinitely vulnerable to greater powers.
  -- Bene Gesserit axiom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/pkg-systemd-maintainers/attachments/20220801/cc823fae/attachment.sig>