X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fsystemd.xml;h=e0e8d37a90ade54c1788838a6cbc0f796db2b9b3;hb=d0928791499734e202460d5c027b5d3e0d28e7ab;hp=cd38c1637572b856dd755faaf9c3822ae1517002;hpb=d2a514b8388e77e3ef228070422b7b73af2b4f10;p=elogind.git
diff --git a/man/systemd.xml b/man/systemd.xml
index cd38c1637..e0e8d37a9 100644
--- a/man/systemd.xml
+++ b/man/systemd.xml
@@ -21,7 +21,8 @@
along with systemd; If not, see .
-->
-
+systemd
@@ -74,10 +75,12 @@
telinit8
for more information.
- When run as system instance, systemd interprets
- the configuration file
- system.conf, otherwise
- user.conf. See
+ When run as a system instance, systemd interprets the
+ configuration file system.conf and the
+ files in system.conf.d directories; when
+ run as a user instance, systemd interprets the configuration
+ file user.conf and the files in
+ user.conf.d directories. See
systemd-system.conf5
for more information.
@@ -88,19 +91,6 @@
The following options are understood:
-
-
-
-
- Prints a short help
- text and exits.
-
-
-
-
- Prints a systemd version
- identifier and exits.
-
@@ -118,25 +108,11 @@
configuration items understood in unit
definition files.
-
-
-
- Extract D-Bus
- interface introspection data. This is
- mostly useful at install time
- to generate data suitable for the
- D-Bus interfaces
- repository. Optionally the interface
- name for the introspection data may be
- specified. If omitted, the
- introspection data for all interfaces
- is dumped.
- Set default unit to
- activate on startup. If not specified
+ activate on startup. If not specified,
defaults to
default.target.
@@ -206,10 +182,8 @@
target. Argument must be one of
,
,
- ,
,
,
- ,
.
@@ -217,7 +191,7 @@
Set log level. As
argument this accepts a numerical log
- level or the well-known syslog3
+ level or the well-known syslog3
symbolic names (lowercase):
,
,
@@ -233,7 +207,7 @@
Highlight important
log messages. Argument is a boolean
- value. If the argument is omitted it
+ value. If the argument is omitted, it
defaults to
.
@@ -278,6 +252,9 @@
to
.
+
+
+
@@ -285,25 +262,27 @@
Conceptssystemd provides a dependency system between
- various entities called "units". Units encapsulate
- various objects that are relevant for system boot-up
- and maintenance. The majority of units are configured
- in unit configuration files, whose syntax and basic
- set of options is described in
+ various entities called "units" of 12 different
+ types. Units encapsulate various objects that are
+ relevant for system boot-up and maintenance. The
+ majority of units are configured in unit configuration
+ files, whose syntax and basic set of options is
+ described in
systemd.unit5,
however some are created automatically from other
- configuration or dynamically from system state. Units
- may be 'active' (meaning started, bound, plugged in,
- ... depending on the unit type, see below), or
- 'inactive' (meaning stopped, unbound, unplugged, ...),
- as well as in the process of being activated or
- deactivated, i.e. between the two states (these states
- are called 'activating', 'deactivating'). A special
- 'failed' state is available as well which is very
- similar to 'inactive' and is entered when the service
- failed in some way (process returned error code on
- exit, or crashed, or an operation timed out). If this
- state is entered the cause will be logged, for later
+ configuration, dynamically from system state or
+ programmatically at runtime. Units may be "active"
+ (meaning started, bound, plugged in, ..., depending on
+ the unit type, see below), or "inactive" (meaning
+ stopped, unbound, unplugged, ...), as well as in the
+ process of being activated or deactivated,
+ i.e. between the two states (these states are called
+ "activating", "deactivating"). A special "failed"
+ state is available as well, which is very similar to
+ "inactive" and is entered when the service failed in
+ some way (process returned error code on exit, or
+ crashed, or an operation timed out). If this state is
+ entered, the cause will be logged, for later
reference. Note that the various unit types may have a
number of additional substates, which are mapped to
the five generalized unit states described
@@ -312,7 +291,7 @@
The following unit types are available:
- Service units, which control
+ Service units, which start and control
daemons and the processes they consist of. For
details see
systemd.service5.
@@ -369,6 +348,18 @@
objects change or are modified. See
systemd.path5.
+ Slice units may be used to
+ group units which manage system processes
+ (such as service and scope units) in a
+ hierarchical tree for resource management
+ purposes. See
+ systemd.slice5.
+
+ Scope units are similar to
+ service units, but manage foreign processes
+ instead of starting them as well. See
+ systemd.scope5.
+
Units are named as their configuration
@@ -393,7 +384,7 @@
and ordering dependencies are placed between two
units. Also note that the majority of dependencies are
implicitly created and maintained by systemd. In most
- cases it should be unnecessary to declare additional
+ cases, it should be unnecessary to declare additional
dependencies manually, however it is possible to do
this.
@@ -415,7 +406,7 @@
multi-user.target (for limited
console-only boots for use in embedded or server
environments, or similar; a subset of
- graphical.target). However it is at the discretion of
+ graphical.target). However, it is at the discretion of
the administrator to configure it as an alias to any
other target unit. See
systemd.special7
@@ -425,7 +416,7 @@
individual Linux control groups named after the unit
which they belong to in the private systemd
hierarchy. (see cgroups.txt
+ url="https://www.kernel.org/doc/Documentation/cgroups/cgroups.txt">cgroups.txt
for more information about control groups, or short
"cgroups"). systemd uses this to effectively keep
track of processes. Control group information is
@@ -433,7 +424,7 @@
file system hierarchy (beneath
/sys/fs/cgroup/systemd/), or in tools
such as
- ps1
+ ps1
(ps xawf -eo pid,user,cgroup,args
is particularly useful to list all processes and the
systemd units they belong to.).
@@ -473,14 +464,14 @@
Systemd contains native implementations of
various tasks that need to be executed as part of the
- boot process. For example, it sets the host name or
+ boot process. For example, it sets the hostname or
configures the loopback network device. It also sets
up and mounts various API file systems, such as
/sys or
/proc.For more information about the concepts and
- ideas behind systemd please refer to the Original
Design Document.
@@ -508,7 +499,7 @@
Directories
-
+ System unit directories
@@ -611,7 +602,7 @@
- SIGTERM
+ SIGTERMUpon receiving this
signal the systemd system manager
@@ -631,7 +622,7 @@
- SIGINT
+ SIGINTUpon receiving this
signal the systemd system manager will
@@ -643,11 +634,11 @@
systemd user managers
treat this signal the same way as
- SIGTERM.
+ SIGTERM.
- SIGWINCH
+ SIGWINCHWhen this signal is
received the systemd system manager
@@ -663,7 +654,7 @@
- SIGPWR
+ SIGPWRWhen this signal is
received the systemd manager
@@ -675,7 +666,7 @@
- SIGUSR1
+ SIGUSR1When this signal is
received the systemd manager will try
@@ -684,18 +675,18 @@
- SIGUSR2
+ SIGUSR2When this signal is
received the systemd manager will log
its complete state in human readable
form. The data logged is the same as
- printed by systemctl
+ printed by systemd-analyze
dump.
- SIGHUP
+ SIGHUPReloads the complete
daemon configuration. This is mostly
@@ -704,7 +695,7 @@
- SIGRTMIN+0
+ SIGRTMIN+0Enters default mode, starts the
default.target
@@ -714,7 +705,7 @@
- SIGRTMIN+1
+ SIGRTMIN+1Enters rescue mode,
starts the
@@ -725,7 +716,7 @@
- SIGRTMIN+2
+ SIGRTMIN+2Enters emergency mode,
starts the
@@ -736,7 +727,7 @@
- SIGRTMIN+3
+ SIGRTMIN+3Halts the machine,
starts the
@@ -747,7 +738,7 @@
- SIGRTMIN+4
+ SIGRTMIN+4Powers off the machine,
starts the
@@ -758,7 +749,7 @@
- SIGRTMIN+5
+ SIGRTMIN+5Reboots the machine,
starts the
@@ -769,7 +760,7 @@
- SIGRTMIN+6
+ SIGRTMIN+6Reboots the machine via kexec,
starts the
@@ -780,31 +771,31 @@
- SIGRTMIN+13
+ SIGRTMIN+13Immediately halts the machine.
- SIGRTMIN+14
+ SIGRTMIN+14Immediately powers off the machine.
- SIGRTMIN+15
+ SIGRTMIN+15Immediately reboots the machine.
- SIGRTMIN+16
+ SIGRTMIN+16Immediately reboots the machine with kexec.
- SIGRTMIN+20
+ SIGRTMIN+20Enables display of
status messages on the console, as
@@ -815,7 +806,7 @@
- SIGRTMIN+21
+ SIGRTMIN+21Disables display of
status messages on the console, as
@@ -826,23 +817,23 @@
- SIGRTMIN+22
- SIGRTMIN+23
+ SIGRTMIN+22
+ SIGRTMIN+23Sets the log level to
debug
(or info on
- SIGRTMIN+23), as
+ SIGRTMIN+23), as
controlled via
systemd.log_level=debug
(or systemd.log_level=info
- on SIGRTMIN+23) on
+ on SIGRTMIN+23) on
the kernel command
line.
- SIGRTMIN+24
+ SIGRTMIN+24Immediately exits the
manager (only available for --user
@@ -850,29 +841,24 @@
- SIGRTMIN+26
- SIGRTMIN+27
- SIGRTMIN+28
- SIGRTMIN+29
+ SIGRTMIN+26
+ SIGRTMIN+27
+ SIGRTMIN+28Sets the log level to
- journal-or-kmsg
- (or console on
- SIGRTMIN+27,
+ journal-or-kmsg (or
+ console on
+ SIGRTMIN+27,
kmsg on
- SIGRTMIN+28,
- or syslog-or-kmsg
- on SIGRTMIN+29), as
+ SIGRTMIN+28), as
controlled via
systemd.log_target=journal-or-kmsg
- (or systemd.log_target=console
- on SIGRTMIN+27,
+ (or
+ systemd.log_target=console
+ on SIGRTMIN+27 or
systemd.log_target=kmsg
- on SIGRTMIN+28,
- or
- systemd.log_target=syslog-or-kmsg
- on SIGRTMIN+29) on
- the kernel command
+ on SIGRTMIN+28)
+ on the kernel command
line.
@@ -1008,7 +994,7 @@
option prefixed with
rd. is honored
only in the initial RAM disk (initrd),
- while the one that isn't prefixed only
+ while the one that is not prefixed only
in the main system.
@@ -1016,9 +1002,9 @@
systemd.dump_core=Takes a boolean
- argument. If
+ argument. If ,
systemd dumps core when it
- crashes. Otherwise no core dump is
+ crashes. Otherwise, no core dump is
created. Defaults to
.
@@ -1027,9 +1013,9 @@
systemd.crash_shell=Takes a boolean
- argument. If
+ argument. If ,
systemd spawns a shell when it
- crashes. Otherwise no shell is
+ crashes. Otherwise, no shell is
spawned. Defaults to
, for security
reasons, as the shell is not protected
@@ -1044,14 +1030,14 @@
argument. If positive systemd
activates the specified virtual
terminal when it crashes. Defaults to
- -1.
+ -1.
systemd.confirm_spawn=Takes a boolean
- argument. If
+ argument. If ,
asks for confirmation when spawning
processes. Defaults to
.
@@ -1061,14 +1047,20 @@
systemd.show_status=Takes a boolean
- argument. If
- shows terse service status updates on
- the console during bootup. Defaults to
+ argument or the constant
+ auto. If
+ , shows terse
+ service status updates on the console
+ during bootup.
+ auto behaves like
+ until a service
+ fails or there is a significant delay
+ in boot. Defaults to
, unless
is passed as
kernel command line option in which
case it defaults to
- .
+ auto.
@@ -1099,44 +1091,55 @@
systemd.setenv=Takes a string
- argument in the form
- VARIABLE=VALUE. May be used to set
- environment variables for the init
- process and all its children at boot
- time. May be used more than once to
- set multiple variables. If the equal
- sign and variable are missing it unsets
- an environment variable which might be
- passed in from the initial ram
- disk.
+ argument in the form VARIABLE=VALUE.
+ May be used to set default environment
+ variables to add to forked child processes.
+ May be used more than once to set multiple
+ variables.
quiet
- If passed turns off
+ Turn off
status output at boot, much like
systemd.show_status=false
would. Note that this option is also
read by the kernel itself and disables
- kernel log output to the
- kernel. Passing this option hence
- turns off the usual output from both
- the system manager and the
+ kernel log output. Passing this option
+ hence turns off the usual output from
+ both the system manager and the kernel.
+
+
+
+
+ debug
+
+ Turn on debugging
+ output. This is equivalent to
+ systemd.log_level=debug.
+ Note that this option is also read by
+ the kernel itself and enables kernel
+ debug output. Passing this option
+ hence turns on the debug output from
+ both the system manager and the
kernel.emergency
+ -bBoot into emergency
mode. This is equivalent to
systemd.unit=emergency.target
- and provided for compatibility
- reasons and to be easier to type.
+ and provided for compatibility reasons
+ and to be easier to
+ type.
+ rescuesinglesS
@@ -1210,7 +1213,7 @@
Daemon status
notification socket. This is an
- AF_UNIX datagram socket and is used to
+ AF_UNIX datagram socket and is used to
implement the daemon notification
logic as implemented by
sd_notify3.
@@ -1223,7 +1226,7 @@
Used internally by the
shutdown8
tool to implement delayed
- shutdowns. This is an AF_UNIX datagram
+ shutdowns. This is an AF_UNIX datagram
socket.
@@ -1234,7 +1237,7 @@
communication channel between
systemctl1
and the systemd process. This is an
- AF_UNIX stream socket. This interface
+ AF_UNIX stream socket. This interface
is private to systemd and should not
be used in external
projects.
@@ -1258,6 +1261,7 @@
See Also
+ The systemd Homepage,
systemd-system.conf5,
locale.conf5,
systemctl1,
@@ -1267,9 +1271,9 @@
sd-daemon3,
systemd.unit5,
systemd.special5,
- pkg-config1,
+ pkg-config1,
kernel-command-line7,
- bootup7,
+ bootup7,
systemd.directives7