systemd-analyze

systemd-analyze is an analyzer and toolkit to help with tuning the system for performance and security

Installation
Usage
- Options
- Subcommands
Examples

Installation

When systemd-analyze is not installed by default, it can be added to the system using the relevant software package.

Package information for systemd-analyze

Operating system	Package name	Installation
AlmaLinux	systemd	`dnf install systemd`
Arch Linux	systemd	`pacman -S systemd`
Debian	systemd	`apt install systemd`
Fedora	systemd	`dnf install systemd`
Red Hat Enterprise Linux	systemd	`dnf install systemd`
Rocky Linux	systemd	`dnf install systemd`
Ubuntu	systemd	`apt install systemd`

Your Linux distribution using a different package? Share your feedback.

Usage

Available options

Short option	Long option	Description
	--no-pager	Disable the pager, making it easier to parse the information

Missing an option in this overview? Share your feedback.

Subcommands

Command	Description	Extra information
architectures	Show information about supported architecture, including the native architecture of the system
blame	Show unit timing information ordered by duration
calendar	Test calendar entry
capability [NAME]	Show available capabilities
cat-config	Show parsed configuration files
compare-versions	Compare two versions strings and show result
condition	Evalute a condition
critical-chain	Provide a tree with timing information
dot	Gather information for dot utility to show a dependency graph
dump [PATTERN]	Output state of service manager
exit-status	Shows available exit status codes and their mapped name
filesystems [NAME]	Show filesystems
fdstore SERVICE	Show file descriptor information for a service
image-policy POLICY	Analyze an image policy string
inspect-elf FILE	Parse and print ELF package information
malloc [D-BUS SERVICE]	Dump malloc statistics for D-Bus services
plot	Create SVG graphic for service initialization
pcrs [PCR]	Show platform counter registers (PCR) for TPM2 devices, including their names
security [UNIT]	Perform analysis on unit to determine possible security improvements
srk [>FILE]	Read Storage Root Key (SRK) from TPM2 device and writes it (TPM2B_PUBLIC format) to stdout
syscall-filter [NAME]	List available syscalls in a seccomp filter
time	Shows time spent in the different stages of the boot cycle
timespan	Parse a duration (in time) and show the normalized form
timestamp	Parse a timestamp and show the normalized form
unit-files	Show all files and symlinks for units
unit-paths	Show directories used for units
verify FILE	Validator function for unit files

Missing a command? Share your feedback.

architectures

Usage

systemd-analyze architectures

Purpose

architectures shows available CPU architecture support and the native architecture of the system.

Notes:

The native architecture can also be displayed with hostnamectl

blame

Usage

systemd-analyze blame

Purpose

blame shows unit timing information ordered by duration (longest first). It helps finding out why the boot sequence takes a specific amount of time.

Notes:

Due to parallelism timing information might not be reliable
Latency introduced by events such as waiting for hardware might influence timings
Time is measured in the ACTIVATING state of the unit, not all units have this particular state

The subcommand blame can be used without any parameters.

# systemd-analyze blame
1.990s apt-daily-upgrade.service
1.729s dev-mapper-ubuntu\x2d\x2dvg\x2dubuntu\x2d\x2dlv.device
1.664s snap.lxd.activate.service
1.589s snapd.seeded.service
1.184s systemd-random-seed.service
1.005s dev-loop3.device
 993ms dev-loop4.device
 992ms dev-loop5.device
 987ms dev-loop0.device
 986ms dev-loop1.device
 942ms networkd-dispatcher.service
 755ms snapd.service
 750ms cloud-init-local.service
 685ms cloud-config.service
 572ms apt-daily.service
 557ms cloud-final.service
 551ms systemd-logind.service
 527ms systemd-udev-trigger.service
 481ms keyboard-setup.service
 481ms systemd-timesyncd.service
 476ms cloud-init.service
 431ms motd-news.service
 406ms udisks2.service
 404ms upower.service
<snip>

lastmod: 2024-11-18T23:25:31+00:00

calendar

systemd-analyze calendar STRING

Purpose

calendar tests an expression, transforms it into a normalized form, and then shows it. Useful for testing timers and see if they will be triggered at the right time.

Examples

# systemd-analyze calendar "Mon *-*-* 00:00:00"
Normalized form: Mon *-*-* 00:00:00
    Next elapse: Mon 2024-07-01 00:00:00 UTC
       From now: 3 days left

cat-config

Usage

systemd-analyze cat-config CONFIGFILE

Purpose

cat-config shows a parsed configuration file. It aims to replicate the behavior of ‘systemctl cat UNIT’, but for configuration files.

Examples

# systemd-analyze cat-config /etc/systemd/coredump.conf
# /etc/systemd/coredump.conf
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it under the
#  terms of the GNU Lesser General Public License as published by the Free
#  Software Foundation; either version 2.1 of the License, or (at your option)
#  any later version.
#
# Entries in this file show the compile time defaults. Local configuration
# should be created by either modifying this file (or a copy of it placed in
# /etc/ if the original file is shipped in /usr/), or by creating "drop-ins" in
# the /etc/systemd/coredump.conf.d/ directory. The latter is generally
# recommended. Defaults can be restored by simply deleting the main
# configuration file and all drop-ins located in /etc/.
#
# Use 'systemd-analyze cat-config systemd/coredump.conf' to display the full config.
#
# See coredump.conf(5) for details.

[Coredump]
#Storage=external
#Compress=yes
# On 32-bit, the default is 1G instead of 32G.
#ProcessSizeMax=32G
#ExternalSizeMax=32G
#JournalSizeMax=767M
#MaxUse=
#KeepFree=

lastmod: 2024-11-18T23:25:31+00:00

compare-versions

Usage

systemd-analyze compare-versions string1 string2
systemd-analyze compare-versions string1 OPERATOR string2

Purpose

compare-versions compares two strings, optionally with an operator. Based on the outcome, it provides an exit code of 0, 1, 11, or 12.

Operators

lt (less than)
gt (greater than)
le (less or equal)
ge (greater or equal)
eq (equal)
ne (not equal)

Examples

Compare two package versions to see which is the oldest or newest package

# systemd-analyze compare-versions lynis-3.0.3 lynis-3.0.4
lynis-3.0.3 < lynis-3.0.4

The exit code is 11 if the first is greater, otherwise exit code 12. In the example about $? shows 12.

# systemd-analyze compare-versions lynis-3.0.3 gt lynis-3.0.4; echo $?
1

In this case it not true, so exit code of 1. If it is true, then exit 0 will be displayed.

condition

Usage

systemd-analyze condition STRING

Purpose

condition checks an assert or condition and shows the outcome.

# systemd-analyze condition 'AssertPathExists=/var/log'
test.service: AssertPathExists=/var/log succeeded.
Asserts succeeded.
# systemd-analyze condition 'AssertPathExists=/var/log2'
test.service: AssertPathExists=/var/log2 failed.
Asserts failed.

lastmod: 2024-11-18T23:25:31+00:00

critical-chain

Usage

systemd-analyze critical-chain
systemd-analyze critical-chain UNIT

Purpose

critical-chain provides a tree with timing information for units. This may help to find the reason why a service or generic unit may take a long time starting.

Notes:

Similar behavior as blame

Examples

# systemd-analyze critical-chain
The time when unit became active or started is printed after the "@" character.
The time the unit took to start is printed after the "+" character.

graphical.target @6.948s
└─multi-user.target @6.947s
  └─snapd.seeded.service @5.286s +1.589s
    └─basic.target @5.237s
      └─sockets.target @5.236s
        └─snapd.socket @5.231s +4ms
          └─sysinit.target @5.203s
            └─cloud-init.service @4.725s +476ms
              └─cloud-init-local.service @2.350s +750ms
                └─systemd-remount-fs.service @454ms +59ms
                  └─systemd-journald.socket @385ms
                    └─system.slice @354ms
                      └─-.slice @354ms

dot

Usage

systemd-analyze dot
systemd-analyze dot UNIT

Options

--order
--require

Purpose

dot creates input for GraphViz’ dot utility to showing a dependency graph

Notes:

Install graphviz package to pipe information to dot command

Examples

systemd-analyze dot | dot -Tsvg > systemd.svg

lastmod: 2024-11-18T23:25:31+00:00

exit-status

Usage

systemd-analyze exit-status
systemd-analyze exit-status STATUS

Purpose

exit-status shows available exit status codes and their names.

Examples

# systemd-analyze exit-status
NAME                    STATUS CLASS  
SUCCESS                      0 libc
FAILURE                      1 libc
INVALIDARGUMENT              2 LSB
NOTIMPLEMENTED               3 LSB
NOPERMISSION                 4 LSB
NOTINSTALLED                 5 LSB
NOTCONFIGURED                6 LSB
NOTRUNNING                   7 LSB
USAGE                       64 BSD
DATAERR                     65 BSD
NOINPUT                     66 BSD
NOUSER                      67 BSD
NOHOST                      68 BSD
UNAVAILABLE                 69 BSD
SOFTWARE                    70 BSD
OSERR                       71 BSD
OSFILE                      72 BSD
CANTCREAT                   73 BSD
IOERR                       74 BSD
TEMPFAIL                    75 BSD
PROTOCOL                    76 BSD
NOPERM                      77 BSD
CONFIG                      78 BSD
CHDIR                      200 systemd
NICE                       201 systemd
FDS                        202 systemd
EXEC                       203 systemd
MEMORY                     204 systemd
LIMITS                     205 systemd
<snip>

To find out the name of a specific exit status code, define the name or status.

# systemd-analyze exit-status 0
NAME    STATUS CLASS
SUCCESS      0 libc

filesystems

Usage

systemd-analyze filessystems
systemd-analyze filessystems GROUP

Purpose

filesystems shows available filesystems grouped per category.

Example

# systemd-analyze filesystems @common-block
@common-block
    # Common block device filesystems
    btrfs (magic: 0x9123683e)
    erofs (magic: 0xe0f5e1e2)
    exfat (magic: 0x2011bab0)
    ext4 (magic: 0xef53)
    f2fs (magic: 0xf2f52010)
    iso9660 (magic: 0x9660)
    ntfs3 (magic: 0x7366746e)
    squashfs (magic: 0x73717368)
    udf (magic: 0x15013346)
    vfat (magic: 0x4d44)
    xfs (magic: 0x58465342)

lastmod: 2024-11-18T23:25:31+00:00

security

Usage

systemd-analyze security UNIT

Purpose

security performs an audit on a service unit to see what can be done to improve its security level. It defines what settings can be activated to sandbox or restrict a service. Most items are scored and at the end a total risk score is displayed, where a lower score is better.

Example

Running security scan on nginx service.

# systemd-analyze security nginx.service
  NAME                                                        DESCRIPTION                                                                                         EXPOSURE
✓ SystemCallFilter=~@swap                                     System call allow list defined for service, and @swap is not included                                       
✗ SystemCallFilter=~@resources                                System call allow list defined for service, and @resources is included (e.g. ioprio_set is allowed)      0.2
✓ SystemCallFilter=~@reboot                                   System call allow list defined for service, and @reboot is not included                                     
✓ SystemCallFilter=~@raw-io                                   System call allow list defined for service, and @raw-io is not included                                     
✗ SystemCallFilter=~@privileged                               System call allow list defined for service, and @privileged is included (e.g. chown is allowed)          0.2
✓ SystemCallFilter=~@obsolete                                 System call allow list defined for service, and @obsolete is not included                                   
✓ SystemCallFilter=~@mount                                    System call allow list defined for service, and @mount is not included                                      
✓ SystemCallFilter=~@module                                   System call allow list defined for service, and @module is not included                                     
✓ SystemCallFilter=~@debug                                    System call allow list defined for service, and @debug is not included                                      
✓ SystemCallFilter=~@cpu-emulation                            System call allow list defined for service, and @cpu-emulation is not included                              
✓ SystemCallFilter=~@clock                                    System call allow list defined for service, and @clock is not included                                      
✗ RootDirectory=/RootImage=                                   Service runs within the host's root directory                                                            0.1
  SupplementaryGroups=                                        Service runs as root, option does not matter                                                                
  RemoveIPC=                                                  Service runs as root, option does not apply                                                                 
✗ User=/DynamicUser=                                          Service runs as root user                                                                                0.4
<snip>

syscall-filter

Usage

systemd-analyze syscall-filter
systemd-analyze syscall-filter FILTERSET

Purpose

syscall-filter shows which syscalls are part of a filter set, or a group of syscalls.

Examples

# systemd-analyze syscall-filter @network-io
@network-io
    # Network or Unix socket IO, should not be needed if not network facing
    accept
    accept4
    bind
    connect
    getpeername
    getsockname
    getsockopt
    listen
    recv
    recvfrom
    recvmmsg
    recvmmsg_time64
    recvmsg
    send
    sendmmsg
    sendmsg
    sendto
    setsockopt
    shutdown
    socket
    socketcall
    socketpair

lastmod: 2024-11-18T23:25:31+00:00

time

Usage

systemd-analyze time

Purpose

time shows how much time is spent in the kernel, the initrd, and the initialization time for userspace itself.

Notes:

The times do not consider full initialization, as background tasks might still be running, including disk activity to complete the boot process

Examples

# systemd-analyze time                                                                                                                                                                                                                                                                                                                                     
Startup finished in 3.357s (kernel) + 8.125s (userspace) = 11.482s 
graphical.target reached after 6.948s in userspace

timespan

Usage

systemd-analyze timespan STRING

Purpose

timestamp tests an expression, transforms it into a normalized form, and then shows it.

Examples

# systemd-analyze timespan "7 years"
Original: 7 years
      μs: 220903200000000
   Human: 7y

lastmod: 2024-11-18T23:25:31+00:00

timestamp

Usage

systemd-analyze timestamp STRING

Purpose

timestamp tests an expression, transforms it into a normalized form, and then shows when the timestamp was or will be.

Examples

today (when day started)
tomorrow (day in future)
22:00 (hour and minutes)
@1888123123 (Unix timestamp)
2024-12-31T23:59:59Z

# systemd-analyze timestamp "tomorrow"
  Original form: tomorrow
Normalized form: Fri 2024-06-28 00:00:00 UTC
   UNIX seconds: @1719532800
       From now: 10h left

Specific moment in time:

systemd-analyze timestamp "2024-12-31T23:59:59Z"
  Original form: 2024-12-31T23:59:59Z
Normalized form: Wed 2025-01-01 00:59:59 CET
       (in UTC): Tue 2024-12-31 23:59:59 UTC
   UNIX seconds: @1735689599
       From now: 6 months 4 days left

Unix timestamp:

# systemd-analyze timestamp @1888123123
  Original form: @1888123123
Normalized form: Wed 2029-10-31 06:38:43 UTC
   UNIX seconds: @1888123123
       From now: 5 years 4 months left

unit-files

Usage

systemd-analyze unit-files

Purpose

unit-files shows all known unit names and aliases. This is useful for discovering what is available to the system, including where specific services are being referred.

Examples

# systemd-analyze unit-files | grep ssh
ids: sshd-generated@.service → /run/systemd/generator/sshd-generated@.service
ids: sshd-vsock.socket → /run/systemd/generator/sshd-vsock.socket
ids: sshd.service → /usr/lib/systemd/system/sshd.service
ids: ssh-access.target → /usr/lib/systemd/system/ssh-access.target
ids: sshd-unix-local@.service → sshd-generated@.service
ids: sshdgenkeys.service → /usr/lib/systemd/system/sshdgenkeys.service
ids: gpg-agent-ssh@.socket → /usr/lib/systemd/system/gpg-agent-ssh@.socket
ids: sshd-unix-local.socket → /run/systemd/generator/sshd-unix-local.socket
ids: sshd-vsock@.service → sshd-generated@.service
aliases: sshd-unix-local.socket ← sshd-unix-local.socket
aliases: ssh-access.target ← ssh-access.target
aliases: sshd-generated@.service ← sshd-generated@.service, sshd-unix-local@.service, sshd-vsock@.service
aliases: sshdgenkeys.service ← sshdgenkeys.service
aliases: sshd.service ← sshd.service
aliases: gpg-agent-ssh@.socket ← gpg-agent-ssh@.socket
aliases: sshd-vsock.socket ← sshd-vsock.socket

lastmod: 2024-11-18T23:25:31+00:00

unit-paths

Usage

systemd-analyze unit-paths

Purpose

unit-paths shows all paths to look for units.

Examples

# systemd-analyze unit-paths
/etc/systemd/system.control
/run/systemd/system.control
/run/systemd/transient
/run/systemd/generator.early
/etc/systemd/system
/etc/systemd/system.attached
/run/systemd/system
/run/systemd/system.attached
/run/systemd/generator
/usr/local/lib/systemd/system
/usr/lib/systemd/system
/run/systemd/generator.late

verify

Usage

systemd-analyze verify UNIT

Purpose

verify tests a unit file, like a linting tool. Any issues with incorrect assignments will be displayed.

Examples

# systemd-analyze verify nginx.service; echo $?
/etc/systemd/system/nginx.service.d/override.conf:7: Unknown section 'Units'. Ignoring.

Examples using systemd-analyze

Security analysis for services

Analyze nginx unit file for possible improvements to secure the service

systemd-analyze security nginx.service

Relevant articles using the systemd-analyze command

The following articles include an example on how to use systemd-analyze and might be worth further exploring.