SYSTEMD-ANALYZE(1) systemd-analyze SYSTEMD-ANALYZE(1)
NAME
systemd-analyze - Analyze and debug system manager
SYNOPSIS
systemd-analyze [OPTIONS...] [time]
systemd-analyze [OPTIONS...] blame
systemd-analyze [OPTIONS...] critical-chain [UNIT...]
systemd-analyze [OPTIONS...] log-level [LEVEL]
systemd-analyze [OPTIONS...] log-target [TARGET]
systemd-analyze [OPTIONS...] service-watchdogs [BOOL]
systemd-analyze [OPTIONS...] dump
systemd-analyze [OPTIONS...] plot [>file.svg]
systemd-analyze [OPTIONS...] dot [PATTERN...] [>file.dot]
systemd-analyze [OPTIONS...] unit-paths
systemd-analyze [OPTIONS...] syscall-filter [SET...]
systemd-analyze [OPTIONS...] calendar SPECS...
systemd-analyze [OPTIONS...] timespan SPAN...
systemd-analyze [OPTIONS...] cat-config NAME|PATH...
systemd-analyze [OPTIONS...] security UNIT...
DESCRIPTION
systemd-analyze may be used to determine system boot-up performance
statistics and retrieve other state and tracing information from the
system and service manager, and to verify the correctness of unit
files. It is also used to access special functions useful for advanced
system manager debugging.
If no command is passed, systemd-analyze time is implied.
systemd-analyze time
This command prints the time spent in the kernel before userspace has
been reached, the time spent in the initial RAM disk (initrd) before
normal system userspace has been reached, and the time normal system
userspace took to initialize. Note that these measurements simply
measure the time passed up to the point where all system services have
been spawned, but not necessarily until they fully finished
initialization or the disk is idle.
Example 1. Show how long the boot took
# in a container
$ systemd-analyze time
Startup finished in 296ms (userspace)
multi-user.target reached after 275ms in userspace
# on a real machine
$ systemd-analyze time
Startup finished in 2.584s (kernel) + 19.176s (initrd) + 47.847s (userspace) = 1min 9.608s
multi-user.target reached after 47.820s in userspace
systemd-analyze blame
This command prints a list of all running units, ordered by the time
they took to initialize. This information may be used to optimize
boot-up times. Note that the output might be misleading as the
initialization of one service might be slow simply because it waits for
the initialization of another service to complete. Also note:
systemd-analyze blame doesn't display results for services with
Type=simple, because systemd considers such services to be started
immediately, hence no measurement of the initialization delays can be
done.
Example 2. Show which units took the most time during boot
$ systemd-analyze blame
32.875s pmlogger.service
20.905s systemd-networkd-wait-online.service
13.299s dev-vda1.device
...
23ms sysroot.mount
11ms initrd-udevadm-cleanup-db.service
3ms sys-kernel-config.mount
systemd-analyze critical-chain [UNIT...]
This command prints a tree of the time-critical chain of units (for
each of the specified UNITs or for the default target otherwise). The
time after the unit is active or started is printed after the "@"
character. The time the unit takes to start is printed after the "+"
character. Note that the output might be misleading as the
initialization of services might depend on socket activation and
because of the parallel execution of units.
Example 3. systemd-analyze time
$ systemd-analyze critical-chain
multi-user.target @47.820s
pmie.service @35.968s +548ms
pmcd.service @33.715s +2.247s
network-online.target @33.712s
systemd-networkd-wait-online.service @12.804s +20.905s
systemd-networkd.service @11.109s +1.690s
systemd-udevd.service @9.201s +1.904s
systemd-tmpfiles-setup-dev.service @7.306s +1.776s
kmod-static-nodes.service @6.976s +177ms
systemd-journald.socket
system.slice
-.slice
systemd-analyze log-level [LEVEL]
systemd-analyze log-level prints the current log level of the systemd
daemon. If an optional argument LEVEL is provided, then the command
changes the current log level of the systemd daemon to LEVEL (accepts
the same values as --log-level= described in systemd(1)).
systemd-analyze log-target [TARGET]
systemd-analyze log-target prints the current log target of the systemd
daemon. If an optional argument TARGET is provided, then the command
changes the current log target of the systemd daemon to TARGET (accepts
the same values as --log-target=, described in systemd(1)).
systemd-analyze service-watchdogs [yes|no]
systemd-analyze service-watchdogs prints the current state of service
runtime watchdogs of the systemd daemon. If an optional boolean
argument is provided, then globally enables or disables the service
runtime watchdogs (WatchdogSec=) and emergency actions (e.g.
OnFailure= or StartLimitAction=); see systemd.service(5). The hardware
watchdog is not affected by this setting.
systemd-analyze dump
This command outputs a (usually very long) human-readable serialization
of the complete server state. Its format is subject to change without
notice and should not be parsed by applications.
Example 4. Show the internal state of user manager
$ systemd-analyze --user dump
Timestamp userspace: Thu 2019-03-14 23:28:07 CET
Timestamp finish: Thu 2019-03-14 23:28:07 CET
Timestamp generators-start: Thu 2019-03-14 23:28:07 CET
Timestamp generators-finish: Thu 2019-03-14 23:28:07 CET
Timestamp units-load-start: Thu 2019-03-14 23:28:07 CET
Timestamp units-load-finish: Thu 2019-03-14 23:28:07 CET
-> Unit proc-timer_list.mount:
Description: /proc/timer_list
...
-> Unit default.target:
Description: Main user target
...
systemd-analyze plot
This command prints an SVG graphic detailing which system services have
been started at what time, highlighting the time they spent on
initialization.
Example 5. Plot a bootchart
$ systemd-analyze plot >bootup.svg
$ eog bootup.svg&
systemd-analyze dot [pattern...]
This command generates textual dependency graph description in dot
format for further processing with the GraphViz dot(1) tool. Use a
command line like systemd-analyze dot | dot -Tsvg >systemd.svg to
generate a graphical dependency tree. Unless --order or --require is
passed, the generated graph will show both ordering and requirement
dependencies. Optional pattern globbing style specifications (e.g.
*.target) may be given at the end. A unit dependency is included in the
graph if any of these patterns match either the origin or destination
node.
Example 6. Plot all dependencies of any unit whose name starts with
"avahi-daemon"
$ systemd-analyze dot 'avahi-daemon.*' | dot -Tsvg >avahi.svg
$ eog avahi.svg
Example 7. Plot the dependencies between all known target units
$ systemd-analyze dot --to-pattern='*.target' --from-pattern='*.target' \
| dot -Tsvg >targets.svg
$ eog targets.svg
systemd-analyze unit-paths
This command outputs a list of all directories from which unit files,
.d overrides, and .wants, .requires symlinks may be loaded. Combine
with --user to retrieve the list for the user manager instance, and
--global for the global configuration of user manager instances.
Example 8. Show all paths for generated units
$ systemd-analyze unit-paths | grep '^/run'
/run/systemd/system.control
/run/systemd/transient
/run/systemd/generator.early
/run/systemd/system
/run/systemd/system.attached
/run/systemd/generator
/run/systemd/generator.late
Note that this verb prints the list that is compiled into
systemd-analyze itself, and does not comunicate with the running
manager. Use
systemctl [--user] [--global] show -p UnitPath --value
to retrieve the actual list that the manager uses, with any empty
directories omitted.
systemd-analyze syscall-filter [SET...]
This command will list system calls contained in the specified system
call set SET, or all known sets if no sets are specified. Argument SET
must include the "@" prefix.
systemd-analyze calendar EXPRESSION...
This command will parse and normalize repetitive calendar time events,
and will calculate when they elapse next. This takes the same input as
the OnCalendar= setting in systemd.timer(5), following the syntax
described in systemd.time(7).
systemd-analyze cat-config NAME|PATH...
This command is similar to systemctl cat, but operates on config files.
It will copy the contents of a config file and any drop-ins to standard
output, using the usual systemd set of directories and rules for
precedence. Each argument must be either an absolute path including the
prefix (such as /etc/systemd/logind.conf or
/usr/lib/systemd/logind.conf), or a name relative to the prefix (such
as systemd/logind.conf).
Example 9. Showing logind configuration
$ systemd-analyze cat-config systemd/logind.conf
# /etc/systemd/logind.conf
...
[Login]
NAutoVTs=8
...
# /usr/lib/systemd/logind.conf.d/20-test.conf
... some override from another package
# /etc/systemd/logind.conf.d/50-override.conf
... some administrator override
systemd-analyze verify FILE...
This command will load unit files and print warnings if any errors are
detected. Files specified on the command line will be loaded, but also
any other units referenced by them. The full unit search path is formed
by combining the directories for all command line arguments, and the
usual unit load paths (variable $SYSTEMD_UNIT_PATH is supported, and
may be used to replace or augment the compiled in set of unit load
paths; see systemd.unit(5)). All units files present in the directories
containing the command line arguments will be used in preference to the
other paths.
The following errors are currently detected:
o unknown sections and directives,
o missing dependencies which are required to start the given unit,
o man pages listed in Documentation= which are not found in the
system,
o commands listed in ExecStart= and similar which are not found in
the system or not executable.
Example 10. Misspelt directives
$ cat ./user.slice
[Unit]
WhatIsThis=11
Documentation=man:nosuchfile(1)
Requires=different.service
[Service]
Description=x
$ systemd-analyze verify ./user.slice
[./user.slice:9] Unknown lvalue 'WhatIsThis' in section 'Unit'
[./user.slice:13] Unknown section 'Service'. Ignoring.
Error: org.freedesktop.systemd1.LoadFailed:
Unit different.service failed to load:
No such file or directory.
Failed to create user.slice/start: Invalid argument
user.slice: man nosuchfile(1) command failed with code 16
Example 11. Missing service units
$ tail ./a.socket ./b.socket
==> ./a.socket <==
[Socket]
ListenStream=100
==> ./b.socket <==
[Socket]
ListenStream=100
Accept=yes
$ systemd-analyze verify ./a.socket ./b.socket
Service a.service not loaded, a.socket cannot be started.
Service b AT 0.service not loaded, b.socket cannot be started.
systemd-analyze security [UNIT...]
This command analyzes the security and sandboxing settings of one or
more specified service units. If at least one unit name is specified
the security settings of the specified service units are inspected and
a detailed analysis is shown. If no unit name is specified, all
currently loaded, long-running service units are inspected and a terse
table with results shown. The command checks for various
security-related service settings, assigning each a numeric "exposure
level" value, depending on how important a setting is. It then
calculates an overall exposure level for the whole unit, which is an
estimation in the range 0.0...10.0 indicating how exposed a service is
security-wise. High exposure levels indicate very little applied
sandboxing. Low exposure levels indicate tight sandboxing and strongest
security restrictions. Note that this only analyzes the per-service
security features systemd itself implements. This means that any
additional security mechanisms applied by the service code itself are
not accounted for. The exposure level determined this way should not be
misunderstood: a high exposure level neither means that there is no
effective sandboxing applied by the service code itself, nor that the
service is actually vulnerable to remote or local attacks. High
exposure levels do indicate however that most likely the service might
benefit from additional settings applied to them.
Please note that many of the security and sandboxing settings
individually can be circumvented -- unless combined with others. For
example, if a service retains the privilege to establish or undo mount
points many of the sandboxing options can be undone by the service code
itself. Due to that is essential that each service uses the most
comprehensive and strict sandboxing and security settings possible. The
tool will take into account some of these combinations and
relationships between the settings, but not all. Also note that the
security and sandboxing settings analyzed here only apply to the
operations executed by the service code itself. If a service has access
to an IPC system (such as D-Bus) it might request operations from other
services that are not subject to the same restrictions. Any
comprehensive security and sandboxing analysis is hence incomplete if
the IPC access policy is not validated too.
Example 12. Analyze systemd-logind.service
$ systemd-analyze security --no-pager systemd-logind.service
NAME DESCRIPTION EXPOSURE
PrivateNetwork= Service has access to the host's network 0.5
User=/DynamicUser= Service runs as root user 0.4
DeviceAllow= Service has no device ACL 0.2
IPAddressDeny= Service blocks all IP address ranges
...
-> Overall exposure level for systemd-logind.service: 4.1 OK
OPTIONS
The following options are understood:
--system
Operates on the system systemd instance. This is the implied
default.
--user
Operates on the user systemd instance.
--global
Operates on the system-wide configuration for user systemd
instance.
--order, --require
When used in conjunction with the dot command (see above), selects
which dependencies are shown in the dependency graph. If --order is
passed, only dependencies of type After= or Before= are shown. If
--require is passed, only dependencies of type Requires=,
Requisite=, Wants= and Conflicts= are shown. If neither is passed,
this shows dependencies of all these types.
--from-pattern=, --to-pattern=
When used in conjunction with the dot command (see above), this
selects which relationships are shown in the dependency graph. Both
options require a glob(7) pattern as an argument, which will be
matched against the left-hand and the right-hand, respectively,
nodes of a relationship.
Each of these can be used more than once, in which case the unit
name must match one of the values. When tests for both sides of the
relation are present, a relation must pass both tests to be shown.
When patterns are also specified as positional arguments, they must
match at least one side of the relation. In other words, patterns
specified with those two options will trim the list of edges
matched by the positional arguments, if any are given, and fully
determine the list of edges shown otherwise.
--fuzz=timespan
When used in conjunction with the critical-chain command (see
above), also show units, which finished timespan earlier, than the
latest unit in the same level. The unit of timespan is seconds
unless specified with a different unit, e.g. "50ms".
--man=no
Do not invoke man to verify the existence of man pages listed in
Documentation=.
--generators
Invoke unit generators, see systemd.generator(7). Some generators
require root privileges. Under a normal user, running with
generators enabled will generally result in some warnings.
--root=PATH
With cat-files, show config files underneath the specified root
path PATH.
-H, --host=
Execute the operation remotely. Specify a hostname, or a username
and hostname separated by "@", to connect to. The hostname may
optionally be suffixed by a container name, separated by ":", which
connects directly to a specific container on the specified host.
This will use SSH to talk to the remote machine manager instance.
Container names may be enumerated with machinectl -H HOST.
-M, --machine=
Execute operation on a local container. Specify a container name to
connect to.
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
--no-pager
Do not pipe output into a pager.
EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise.
ENVIRONMENT
$SYSTEMD_PAGER
Pager to use when --no-pager is not given; overrides $PAGER. If
neither $SYSTEMD_PAGER nor $PAGER are set, a set of well-known
pager implementations are tried in turn, including less(1) and
more(1), until one is found. If no pager implementation is
discovered no pager is invoked. Setting this environment variable
to an empty string or the value "cat" is equivalent to passing
--no-pager.
$SYSTEMD_LESS
Override the options passed to less (by default "FRSXMK").
$SYSTEMD_LESSCHARSET
Override the charset passed to less (by default "utf-8", if the
invoking terminal is determined to be UTF-8 compatible).
$SYSTEMD_PAGERSECURE
Takes a boolean argument. When true, the "secure" mode of the pager
is enabled; if false, disabled. If $SYSTEMD_PAGERSECURE is not set
at all, secure mode is enabled if the effective UID is not the same
as the owner of the login session, see geteuid(2) and
sd_pid_get_owner_uid(3). In secure mode, LESSSECURE=1 will be set
when invoking the pager, and the pager shall disable commands that
open or create new files or start new subprocesses. When
$SYSTEMD_PAGERSECURE is not set at all, pagers which are not known
to implement secure mode will not be used. (Currently only less(1)
implements secure mode.)
Note: when commands are invoked with elevated privileges, for
example under sudo(8) or pkexec(1), care must be taken to ensure
that unintended interactive features are not enabled. "Secure" mode
for the pager may be enabled automatically as describe above.
Setting SYSTEMD_PAGERSECURE=0 or not removing it from the inherited
environment allows the user to invoke arbitrary commands. Note that
if the $SYSTEMD_PAGER or $PAGER variables are to be honoured,
$SYSTEMD_PAGERSECURE must be set too. It might be reasonable to
completly disable the pager using --no-pager instead.
SEE ALSO
systemd(1), systemctl(1)
systemd 239 SYSTEMD-ANALYZE(1)
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