SYSTEMD-ANALYZE(1)                                                      systemd-analyze                                                      SYSTEMD-ANALYZE(1)

NAME
       systemd-analyze - Analyze system boot-up performance

SYNOPSIS
       systemd-analyze [OPTIONS...] [time]

       systemd-analyze [OPTIONS...] blame

       systemd-analyze [OPTIONS...] critical-chain [UNIT...]

       systemd-analyze [OPTIONS...] plot [> file.svg]

       systemd-analyze [OPTIONS...] dot [PATTERN...] [> file.dot]

       systemd-analyze [OPTIONS...] dump

       systemd-analyze [OPTIONS...] set-log-level LEVEL

       systemd-analyze [OPTIONS...] set-log-target TARGET

       systemd-analyze [OPTIONS...] verify [FILES...]

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.

       systemd-analyze time 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.

       systemd-analyze blame 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.

       systemd-analyze critical-chain [UNIT...]  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 one service might depend on socket activation and because of the parallel
       execution of units.

       systemd-analyze plot prints an SVG graphic detailing which system services have been started at what time, highlighting the time they spent on
       initialization.

       systemd-analyze dot 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.

       systemd-analyze dump 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.

       systemd-analyze set-log-level LEVEL changes the current log level of the systemd daemon to LEVEL (accepts the same values as --log-level= described in
       systemd(1)).

       systemd-analyze set-log-target TARGET changes the current log target of the systemd daemon to TARGET (accepts the same values as --log-target=,
       described in systemd(1)).

       systemd-analyze verify 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.

       If no command is passed, systemd-analyze time is implied.

OPTIONS
       The following options are understood:

       --user
           Operates on the user systemd instance.

       --system
           Operates on the system systemd instance. This is the implied default.

       --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".

       --no-man
           Do not invoke man to verify the existence of man pages listed in Documentation=.

       -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.

EXAMPLES FOR DOT
       Example 1. Plots all dependencies of any unit whose name starts with "avahi-daemon"

           $ systemd-analyze dot 'avahi-daemon.*' | dot -Tsvg > avahi.svg
                 $ eog avahi.svg

       Example 2. Plots the dependencies between all known target units

           systemd-analyze dot --to-pattern='*.target' --from-pattern='*.target' | dot -Tsvg > targets.svg
           $ eog targets.svg

EXAMPLES FOR VERIFY
       The following errors are currently detected:

       ·   unknown sections and directives,

       ·   missing dependencies which are required to start the given unit,

       ·   man pages listed in Documentation= which are not found in the system,

       ·   commands listed in ExecStart= and similar which are not found in the system or not executable.

       Example 3. Misspelt directives

           $ cat ./user.slice
           [Unit]
           WhatIsThis=11
           Documentation=man:nosuchfile(1)
           Requires=different.service

           [Service]
           Desription=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 4. 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@0.service not loaded, b.socket cannot be started.

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).

SEE ALSO
       systemd(1), systemctl(1)

systemd 232                                                                                                                                  SYSTEMD-ANALYZE(1)