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systemd System and Service Manager
+CHANGES WITH 198:
+
+ * Configuration of unit files may now be extended via drop-in
+ files without having to edit/override the unit files
+ themselves. More specifically, if the administrator wants to
+ change one value for a service file foobar.service he can
+ now do so by dropping in a configuration snippet into
+ /etc/systemd/systemd/foobar.service.d/*.conf. The unit logic
+ will load all these snippets and apply them on top of the
+ main unit configuration file, possibly extending or
+ overriding its settings. Using these drop-in snippets is
+ generally nicer than the two earler options for changing
+ unit files locally: copying the files form
+ /usr/lib/systemd/system/ to /etc/systemd/system/ and editing
+ them there; or creating a new file in /etc/systemd/system/
+ that incorporates the original one via ".include". Drop-in
+ snippets into these .d/ directories can be placed in any
+ directory systems looks for units in, and the usual
+ overriding semantics between /usr/lib, /etc and /run apply
+ for them too.
+
+ * Most unit file settings which take lists of items can now be
+ reset by assigning the empty strings to them. For example,
+ normally, settings such as Environment=FOO=BAR append a new
+ environment variable assignment to the environment block,
+ each time they are used. By assigning Environment= the empty
+ string the environment block can be reset to empty. This is
+ particularly useful with the .d/*.conf drop-in snippets
+ mentioned above, since this allows resetting list settings
+ from vendor unit files via these drop-ins.
+
+ * systemctl gained a new "list-dependencies" command for
+ listing the dependencies of a unit recursively.
+
+ * Inhibitors are now honoured and listed by "systemctl
+ suspend", "systemctl poweroff" (and similar) too, not only
+ GNOME. These commands will also list active sessions by
+ other users.
+
+ * Resource limits (as exposed by the various control group
+ controllers) can now be controlled dynamically at runtime
+ for all units. More specifically, you can now use a command
+ like "systemctl set-cgroup-attr foobar.service cpu.shares
+ 2000" to alter the CPU shares a specific service gets. These
+ settings are stores persistently on disk, and thus allow the
+ administrator to easily adjust the resource usage of
+ services with a few simple commands. This dynamic resource
+ management logic is also available to other services via the
+ bus. Almost any kernel cgroup attribute and controller is
+ supported.
+
+ * systemd-vconsole-setup will now copy all font settings to
+ all open VTs, where it previously applied them only to the
+ foreground VT.
+
+ * libsystemd-login gained the new sd_session_get_tty() API
+ call.
+
+ * This release drops support with a few
+ legacy/distribution-specific LSB facility names when parsing
+ init scripts: $x-display-manager, $mail-transfer-agent,
+ $mail-transport-agent, $mail-transfer-agent, $smtp,
+ $null. Also, the mail-transfer-agent.target unit backing
+ this has been removed. Distributions which want to retain
+ compatibility with this should carry the burden for support
+ this themselves and patch support for these back in if they
+ really need to. Also, the facilities $syslog and $local_fs
+ are now ignored, since systemd does not support early-boot
+ LSB init scripts anymore, and these facilities are implied
+ anyway for normal services. syslog.target has also been
+ removed hence.
+
+ * There ar new bus calls on PID1's Manager object for
+ canceling jobs, and removing snapshot units. Previously,
+ both calls were only available on the Job and Snapshot
+ objects themselves.
+
+ * systemd-journal-gatewayd gained SSL support.
+
+ * The various "environment" files, such as /etc/locale.conf
+ now support continuation lines with a backslash ("\") as
+ last character in the line, similar in style (but different)
+ to how this is supported in shells.
+
+ * For normal user processes the _SYSTEMD_USER_UNIT= field is
+ now implicitly appended to every log entry logged. systemctl
+ has been updated to filter by this field when operating on a
+ user systemd instance.
+
+ * nspawn will now implicitly add the CAP_AUDIT_WRITE and
+ CAP_AUDIT_CONTROL capabilities to the capabilities set for
+ the container. This makes it easier to boot unmodified
+ Fedora systems in a container, which however still requires
+ audit=0 to be passed on the kernel command line. Auditing in
+ kernel and userspace is unfortunately still too broken in
+ context of containers, hence we recommend compiling it out
+ of the kernel or using audit=0. Hopefully this will be fixed
+ one day for good in the kernel.
+
+ * nspawn gained the new --bind= and --bind-ro= parameters to
+ bind mount specific directories from the host into the
+ container.
+
+ * nspawn will not mount its own devpts file system instance
+ into the container, in order not to leaker pty devices from
+ the host into the container.
+
+ * systemd will now read the firmware boot time performance
+ from the EFI variables, if the used boot loader supports
+ this, and take it into account for boot performance analysis
+ via "systemd-analyze". This is currently supported only in
+ conjunction with Gummiboot, but could be supported by other
+ boot loaders too. For details, see:
+
+ http://www.freedesktop.org/wiki/Software/systemd/BootLoaderInterface
+
+ * A new generator has been added that automatically mounts the
+ EFI System Partition (ESP) to /boot, if that directory
+ exists, is empty, and no other partition has been configured
+ to be mounted there.
+
+ * logind will now send out PrepareForSleep(false) out
+ unconditionally, after coming back from suspend. This may be
+ used by applications as asynchronous notification for
+ system resume events.
+
+ * "systemctl unlock-sessions" has been added, that allows
+ unlocking the screens of all user sessions at once, similar
+ how "systemctl lock-sessions" already locked all users
+ sessions. This is backed by a new D-Bus call
+ UnlockSessions().
+
+ * "loginctl seat-status" will now show the master device of a
+ seat. (i.e. the device of a seat that needs to be around for
+ the seat to be considered available, usually the graphics
+ card).
+
+ * tmpfiles gained a new "X" line type, that allows
+ configuration of files and directories (with wildcards) that
+ shall be excluded from automatic cleanup ("aging").
+
+ * udev permission rules are now only applied for "add" rules,
+ no longer for "change" events.
+
+ * The log messages for lid events and power/sleep keypresses
+ now carry a message ID.
+
+ * We now have a substantially larger unit test suite, but this
+ continues to be work in progress.
+
+ * udevadm hwdb gained a new --root= parameter to change the
+ root directory to operate relative to.
+
+ * logind will now issue a sync() request to the kernel early
+ at shutdown, so that dirty buffers are flushed to disk early
+ instead of at the last moment, in order to optimize shutdown
+ times a little.
+
+ * A new bootctl tool has been added that is an interface for
+ certain boot loader operations. This is currently a preview
+ and is likely to be extended into a small mechanism daemon
+ like timedated, localed, hostnamed, and can be used by
+ graphical UIs to enumerate available boot options, and
+ request boot into firmware operations.
+
+ * systemd-bootchart has been relicensed to LGPLv2.1+ to match
+ the rest of the package. It also has been updated to work
+ correctly in initrds.
+
+ * Policykit previously has been runtime optional, and is now
+ also compile time optional via a configure switch.
+
+ * systemd-analyze has been reimplemented in C. Also "systemctl
+ dot" has moved into systemd-analyze.
+
+ * "systemctl status" with no further parameters will now print
+ the status of all active or failed units.
+
+ * Operations such as "systemctl start" can now be executed
+ with a new mode "--irreversible" which may be used to queue
+ operations that cannot accidentally be reversed by a later
+ job queuing. This is by default use to make shutdown
+ requests more robust.
+
+ * The Python API of systemd now gained a new module for
+ reading journal files.
+
+ * A new tool kernel-install has been added that can install
+ kernel images according to the Boot Loader Specification:
+
+ http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec
+
+ * Boot time console output has been improved to provide
+ animated boot time output.
+
+ * A new tool systemd-activate has been added which can be used
+ to test socket activation with, directly from the command
+ line. This should make it much easier to test and debug
+ socket activation in daemons.
+
+ * journalctl gained a new "--reverse" (or -r) option to show
+ journal output in reverse order (i.e. newest line first).
+
+ * journalctl gained a new "--user-unit=" option, that works
+ similar to "--unit=" but filters for user units rather than
+ system units.
+
+ * A number of unit files to ease adoption of systemd in
+ initrds has been added. This moves some minimal logic from
+ the various initrd implementations into systemd proper.
+
+ * The journal files are now owned by a new group
+ "systemd-journal", which exists specifically to allow access
+ to the journal, and nothing else. Previously, we used the
+ "adm" group for that, which however possible covers more
+ than just journal/log file access. This new group is now
+ already used by systemd-journal-gatewayd to ensure this
+ daemon gets access to the journal files and as little else
+ as possible. Note that "make install" will also set FS ACLs
+ up for /var/log/journal to give "adm" and "wheel" read
+ access to it, in addition to "systemd-journal" which owns
+ the journal files. We recommend that packaging scripts also
+ add read access to "adm", "wheel" to /var/log/journal, and
+ all existing/future journal files. To normal users and
+ administrators little changes, however packagers need to
+ ensure to create the "systemd-journal" system group at
+ package installation time.
+
+ * The systemd-journal-gatewayd now runs as unprivileged user
+ systemd-journal-gateway:systemd-journal-gateway. Packaging
+ scripts need to create these system user/group at
+ installation time.
+
+ * timedated now exposes a new boolean property CanNTP that
+ indicates whether a local NTP service is available or not.
+
+ * systemd-detect-virt will now also detect xen PVs
+
+ * The pstore file system is now mounted by default, if it is available.
+
+ Contributions from: Adel Gadllah, Aleksander Morgado, Auke
+ Kok, Ayan George, Bastien Nocera, Colin Walters, Daniel Buch,
+ Daniel Wallace, Dave Reisner, David Herrmann, David Strauss,
+ Eelco Dolstra, Enrico Scholz, Frederic Crozat, Harald Hoyer,
+ Jan Janssen, Jonathan Callen, Kay Sievers, Lennart Poettering,
+ Lukas Nykryn, Mantas Mikulėnas, Marc-Antoine Perennou, Martin
+ Pitt, Mauro Dreissig, Max F. Albrecht, Michael Biebl, Michael
+ Olbrich, Michal Schmidt, Michal Sekletar, Michal Vyskocil,
+ Michał Bartoszkiewicz, Mirco Tischler, Nathaniel Chen, Nestor
+ Ovroy, Oleksii Shevchuk, Paul W. Frields, Piotr Drąg, Rob
+ Clark, Ryan Lortie, Simon McVittie, Simon Peeters, Steven
+ Hiscocks, Thomas Hindoe Paaboel Andersen, Tollef Fog Heen, Tom
+ Gundersen, Umut Tezduyar, William Giokas, Zbigniew
+ Jędrzejewski-Szmek, Zeeshan Ali (Khattak)
+
CHANGES WITH 197:
* Timer units now support calendar time events in addition to