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4b4a8ef741
The new option --json= works with the 'security' verb and takes in one of three format flags.
These are off which is the default, pretty and short which use JSON format flags for output.
When set to true, it generates a JSON formatted output of the security analysis table. The
format is a JSON array with objects containing the following fields: set which indicates if
the id has been set or not, name which is what is used to refer to the id, json_field
which is the equivalent JSON formatted id name only used for JSON outputs, description which
is an outline of the id state, and exposure which is an unsigned integer in the range 0.0..10.0,
where a higher value corresponds to a higher security threat. The JSON version of the table is
printed on the standard output file.
Example Run:
The unit file testfile.service was created to test the --json= option
maanya-goenka@debian:~/systemd (json-security)$ cat <<EOF >testfile.service
> [Service]
> ExecStart = echo hello
> PrivateNetwork = yes
> PrivateMounts = yes
> PrivateDevices = yes
> EOF
Both the JSON output and the security analysis table below have been truncated to increase readability.
1. Testing for when --json=off
maanya-goenka@debian:~/systemd (json-security)$ sudo build/systemd-analyze security --json=off --root= --offline=true
testfile.service --no-pager
/usr/lib/systemd/system/plymouth-start.service:15: Unit configured to use KillMode=none. This is unsafe, as it disables systemd's
process lifecycle management for the service. Please update your service to use a safer KillMode=, such as 'mixed' or 'control-group'.
Support for KillMode=none is deprecated and will eventually be removed.
/usr/lib/systemd/system/dbus.socket:5: ListenStream= references a path below legacy directory /var/run/, updating
/var/run/dbus/system_bus_socket → /run/dbus/system_bus_socket; please update the unit file accordingly.
/usr/lib/systemd/system/gdm.service:30: Standard output type syslog is obsolete, automatically updating to journal. Please update your
unit file, and consider removing the setting altogether.
/home/maanya-goenka/systemd/foo.service:2: Unknown key name 'foo' in section 'Unit', ignoring.
NAME DESCRIPTION EXPOSURE
✓ PrivateNetwork= Service has no access to the host's network
✗ User=/DynamicUser= Service runs as root user 0.4
✗ CapabilityBoundingSet=~CAP_SET(UID|GID|PCAP) Service may change UID/GID identities/capabilities 0.3
✗ CapabilityBoundingSet=~CAP_NET_ADMIN Service has administrator privileges 0.3
→ Overall exposure level for testfile.service: 8.3 EXPOSED 🙁
2. Testing for when --json=pretty
maanya-goenka@debian:~/systemd (json-security)$ sudo build/systemd-analyze security --json=pretty --root= --offline=true
testfile.service
/usr/lib/systemd/system/plymouth-start.service:15: Unit configured to use KillMode=none. This is unsafe, as it disables systemd's
process lifecycle management for the service. Please update your service to use a safer KillMode=, such as 'mixed' or 'control-group'.
Support for KillMode=none is deprecated and will eventually be removed.
/usr/lib/systemd/system/dbus.socket:5: ListenStream= references a path below legacy directory /var/run/, updating
/var/run/dbus/system_bus_socket → /run/dbus/system_bus_socket; please update the unit file accordingly.
/usr/lib/systemd/system/gdm.service:30: Standard output type syslog is obsolete, automatically updating to journal. Please update your
unit file, and consider removing the setting altogether.
/home/maanya-goenka/systemd/foo.service:2: Unknown key name 'foo' in section 'Unit', ignoring.
[
{
"set" : true,
"name" : "PrivateNetwork=",
"json-field" : "PrivateNetwork",
"description" : "Service has no access to the host's network",
"exposure" : null
},
{
"set" : false,
"name" : "User=/DynamicUser=",
"json-field" : "UserOrDynamicUser",
"decsription" : "Service runs as root user",
"exposure" : "0.4"
},
{
"set" : false,
"name" : "CapabilityBoundingSet=~CAP_SET(UID|GID|PCAP)",
"json_field" : "CapabilityBoundingSet_CAP_SET_UID_GID_PCAP",
"description" : "Service may change UID/GID identities/capabilities",
"exposure" : "0.3"
},
{
"set" : false,
"name" : "CapabilityBoundingSet=~CAP_NET_ADMIN",
"json_field" : "CapabilityBoundingSet_CAP_NET_ADMIN",
"description" : "Service has administrator privileges",
"exposure" : "0.3"
},
...
]
3. Testing for when --json=short
maanya-goenka@debian:~/systemd (json-security)$ sudo build/systemd-analyze security --json=short --root= --offline=true
testfile.service
/usr/lib/systemd/system/plymouth-start.service:15: Unit configured to use KillMode=none. This is unsafe, as it disables systemd's
process lifecycle management for the service. Please update your service to use a safer KillMode=, such as 'mixed' or 'control-group'.
Support for KillMode=none is deprecated and will eventually be removed.
/usr/lib/systemd/system/dbus.socket:5: ListenStream= references a path below legacy directory /var/run/, updating
/var/run/dbus/system_bus_socket → /run/dbus/system_bus_socket; please update the unit file accordingly.
/usr/lib/systemd/system/gdm.service:30: Standard output type syslog is obsolete, automatically updating to journal. Please update your
unit file, and consider removing the setting altogether.
/home/maanya-goenka/systemd/foo.service:2: Unknown key name 'foo' in section 'Unit', ignoring.
[{"set":true,"name":"PrivateNetwork=", "json_field":"PrivateNetwork", "description":"Service has no access to the host's network","exposure":null}, ...]
1184 lines
49 KiB
XML
1184 lines
49 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="systemd-analyze" conditional='ENABLE_ANALYZE'
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-analyze</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-analyze</refentrytitle>
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<manvolnum>1</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-analyze</refname>
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<refpurpose>Analyze and debug system manager</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg>time</arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">blame</arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">critical-chain</arg>
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<arg choice="opt" rep="repeat"><replaceable>UNIT</replaceable></arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">dump</arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">plot</arg>
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<arg choice="opt">>file.svg</arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">dot</arg>
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<arg choice="opt" rep="repeat"><replaceable>PATTERN</replaceable></arg>
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<arg choice="opt">>file.dot</arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">unit-paths</arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">exit-status</arg>
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<arg choice="opt" rep="repeat"><replaceable>STATUS</replaceable></arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">capability</arg>
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<arg choice="opt" rep="repeat"><replaceable>CAPABILITY</replaceable></arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">condition</arg>
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<arg choice="plain"><replaceable>CONDITION</replaceable>…</arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">syscall-filter</arg>
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<arg choice="opt"><replaceable>SET</replaceable>…</arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">calendar</arg>
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<arg choice="plain" rep="repeat"><replaceable>SPEC</replaceable></arg>
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</cmdsynopsis>
|
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<cmdsynopsis>
|
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
|
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<arg choice="plain">timestamp</arg>
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<arg choice="plain" rep="repeat"><replaceable>TIMESTAMP</replaceable></arg>
|
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</cmdsynopsis>
|
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<cmdsynopsis>
|
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">timespan</arg>
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<arg choice="plain" rep="repeat"><replaceable>SPAN</replaceable></arg>
|
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</cmdsynopsis>
|
|
<cmdsynopsis>
|
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">cat-config</arg>
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<arg choice="plain" rep="repeat"><replaceable>NAME</replaceable>|<replaceable>PATH</replaceable></arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">verify</arg>
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<arg choice="opt" rep="repeat"><replaceable>FILE</replaceable></arg>
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</cmdsynopsis>
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<cmdsynopsis>
|
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">security</arg>
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<arg choice="plain" rep="repeat"><replaceable>UNIT</replaceable></arg>
|
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>systemd-analyze</command> may be used to determine
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system boot-up performance statistics and retrieve other state and
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tracing information from the system and service manager, and to
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verify the correctness of unit files. It is also used to access
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special functions useful for advanced system manager debugging.</para>
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<para>If no command is passed, <command>systemd-analyze
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time</command> is implied.</para>
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<refsect2>
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<title><command>systemd-analyze time</command></title>
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<para>This command prints the time spent in the kernel before userspace has been reached, the time
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spent in the initial RAM disk (initrd) before normal system userspace has been reached, and the time
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normal system userspace took to initialize. Note that these measurements simply measure the time passed
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up to the point where all system services have been spawned, but not necessarily until they fully
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finished initialization or the disk is idle.</para>
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<example>
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<title><command>Show how long the boot took</command></title>
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<programlisting># in a container
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$ systemd-analyze time
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Startup finished in 296ms (userspace)
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multi-user.target reached after 275ms in userspace
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# on a real machine
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$ systemd-analyze time
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Startup finished in 2.584s (kernel) + 19.176s (initrd) + 47.847s (userspace) = 1min 9.608s
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multi-user.target reached after 47.820s in userspace
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</programlisting>
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</example>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze blame</command></title>
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<para>This command prints a list of all running units, ordered by the time they took to initialize.
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This information may be used to optimize boot-up times. Note that the output might be misleading as the
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initialization of one service might be slow simply because it waits for the initialization of another
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service to complete. Also note: <command>systemd-analyze blame</command> doesn't display results for
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services with <varname>Type=simple</varname>, because systemd considers such services to be started
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immediately, hence no measurement of the initialization delays can be done. Also note that this command
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only shows the time units took for starting up, it does not show how long unit jobs spent in the
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execution queue. In particular it shows the time units spent in <literal>activating</literal> state,
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which is not defined for units such as device units that transition directly from
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<literal>inactive</literal> to <literal>active</literal>. This command hence gives an impression of the
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performance of program code, but cannot accurately reflect latency introduced by waiting for
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hardware and similar events.</para>
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<example>
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<title><command>Show which units took the most time during boot</command></title>
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<programlisting>$ systemd-analyze blame
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32.875s pmlogger.service
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20.905s systemd-networkd-wait-online.service
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13.299s dev-vda1.device
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...
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23ms sysroot.mount
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11ms initrd-udevadm-cleanup-db.service
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3ms sys-kernel-config.mount
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</programlisting>
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</example>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze critical-chain <optional><replaceable>UNIT</replaceable>...</optional></command></title>
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<para>This command prints a tree of the time-critical chain of units (for each of the specified
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<replaceable>UNIT</replaceable>s or for the default target otherwise). The time after the unit is
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active or started is printed after the "@" character. The time the unit takes to start is printed after
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the "+" character. Note that the output might be misleading as the initialization of services might
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depend on socket activation and because of the parallel execution of units. Also, similar to the
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<command>blame</command> command, this only takes into account the time units spent in
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<literal>activating</literal> state, and hence does not cover units that never went through an
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<literal>activating</literal> state (such as device units that transition directly from
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<literal>inactive</literal> to <literal>active</literal>). Moreover it does not show information on
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jobs (and in particular not jobs that timed out).</para>
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<example>
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<title><command>systemd-analyze critical-chain</command></title>
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<programlisting>$ systemd-analyze critical-chain
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multi-user.target @47.820s
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└─pmie.service @35.968s +548ms
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└─pmcd.service @33.715s +2.247s
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└─network-online.target @33.712s
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└─systemd-networkd-wait-online.service @12.804s +20.905s
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└─systemd-networkd.service @11.109s +1.690s
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└─systemd-udevd.service @9.201s +1.904s
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└─systemd-tmpfiles-setup-dev.service @7.306s +1.776s
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└─kmod-static-nodes.service @6.976s +177ms
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└─systemd-journald.socket
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└─system.slice
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└─-.slice
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</programlisting>
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</example>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze dump</command></title>
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<para>This command outputs a (usually very long) human-readable serialization of the complete server
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state. Its format is subject to change without notice and should not be parsed by applications.</para>
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<example>
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<title>Show the internal state of user manager</title>
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<programlisting>$ systemd-analyze --user dump
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Timestamp userspace: Thu 2019-03-14 23:28:07 CET
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Timestamp finish: Thu 2019-03-14 23:28:07 CET
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Timestamp generators-start: Thu 2019-03-14 23:28:07 CET
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Timestamp generators-finish: Thu 2019-03-14 23:28:07 CET
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Timestamp units-load-start: Thu 2019-03-14 23:28:07 CET
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Timestamp units-load-finish: Thu 2019-03-14 23:28:07 CET
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-> Unit proc-timer_list.mount:
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Description: /proc/timer_list
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...
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-> Unit default.target:
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Description: Main user target
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...
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</programlisting>
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</example>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze plot</command></title>
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<para>This command prints an SVG graphic detailing which system services have been started at what
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time, highlighting the time they spent on initialization.</para>
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<example>
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<title><command>Plot a bootchart</command></title>
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<programlisting>$ systemd-analyze plot >bootup.svg
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$ eog bootup.svg&
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</programlisting>
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</example>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze dot [<replaceable>pattern</replaceable>...]</command></title>
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<para>This command generates textual dependency graph description in dot format for further processing
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with the GraphViz
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<citerefentry project='die-net'><refentrytitle>dot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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tool. Use a command line like <command>systemd-analyze dot | dot -Tsvg >systemd.svg</command> to
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generate a graphical dependency tree. Unless <option>--order</option> or <option>--require</option> is
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passed, the generated graph will show both ordering and requirement dependencies. Optional pattern
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globbing style specifications (e.g. <filename>*.target</filename>) may be given at the end. A unit
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dependency is included in the graph if any of these patterns match either the origin or destination
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node.</para>
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<example>
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<title>Plot all dependencies of any unit whose name starts with <literal>avahi-daemon</literal>
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</title>
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<programlisting>$ systemd-analyze dot 'avahi-daemon.*' | dot -Tsvg >avahi.svg
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$ eog avahi.svg</programlisting>
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</example>
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<example>
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<title>Plot the dependencies between all known target units</title>
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<programlisting>$ systemd-analyze dot --to-pattern='*.target' --from-pattern='*.target' \
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| dot -Tsvg >targets.svg
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$ eog targets.svg</programlisting>
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</example>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze unit-paths</command></title>
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<para>This command outputs a list of all directories from which unit files, <filename>.d</filename>
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overrides, and <filename>.wants</filename>, <filename>.requires</filename> symlinks may be
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loaded. Combine with <option>--user</option> to retrieve the list for the user manager instance, and
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<option>--global</option> for the global configuration of user manager instances.</para>
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<example>
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<title><command>Show all paths for generated units</command></title>
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<programlisting>$ systemd-analyze unit-paths | grep '^/run'
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/run/systemd/system.control
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/run/systemd/transient
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/run/systemd/generator.early
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/run/systemd/system
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/run/systemd/system.attached
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/run/systemd/generator
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/run/systemd/generator.late
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</programlisting>
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</example>
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<para>Note that this verb prints the list that is compiled into <command>systemd-analyze</command>
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itself, and does not communicate with the running manager. Use
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<programlisting>systemctl [--user] [--global] show -p UnitPath --value</programlisting>
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to retrieve the actual list that the manager uses, with any empty directories omitted.</para>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze exit-status <optional><replaceable>STATUS</replaceable>...</optional></command></title>
|
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|
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<para>This command prints a list of exit statuses along with their "class", i.e. the source of the
|
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definition (one of <literal>glibc</literal>, <literal>systemd</literal>, <literal>LSB</literal>, or
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<literal>BSD</literal>), see the Process Exit Codes section in
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<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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If no additional arguments are specified, all known statuses are shown. Otherwise, only the
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definitions for the specified codes are shown.</para>
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<example>
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<title><command>Show some example exit status names</command></title>
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<programlisting>$ systemd-analyze exit-status 0 1 {63..65}
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NAME STATUS CLASS
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SUCCESS 0 glibc
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FAILURE 1 glibc
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- 63 -
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USAGE 64 BSD
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DATAERR 65 BSD
|
|
</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze capability <optional><replaceable>CAPABILITY</replaceable>...</optional></command></title>
|
|
|
|
<para>This command prints a list of Linux capabilities along with their numeric IDs. See <citerefentry
|
|
project='man-pages'><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
for details. If no argument is specified the full list of capabilities known to the service manager and
|
|
the kernel is shown. Capabilities defined by the kernel but not known to the service manager are shown
|
|
as <literal>cap_???</literal>. Optionally, if arguments are specified they may refer to specific
|
|
cabilities by name or numeric ID, in which case only the indicated capabilities are shown in the
|
|
table.</para>
|
|
|
|
<example>
|
|
<title><command>Show some example capability names</command></title>
|
|
|
|
<programlisting>$ systemd-analyze capability 0 1 {30..32}
|
|
NAME NUMBER
|
|
cap_chown 0
|
|
cap_dac_override 1
|
|
cap_audit_control 30
|
|
cap_setfcap 31
|
|
cap_mac_override 32</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze condition <replaceable>CONDITION</replaceable>...</command></title>
|
|
|
|
<para>This command will evaluate <varname index="false">Condition*=...</varname> and
|
|
<varname index="false">Assert*=...</varname> assignments, and print their values, and
|
|
the resulting value of the combined condition set. See
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for a list of available conditions and asserts.</para>
|
|
|
|
<example>
|
|
<title>Evaluate conditions that check kernel versions</title>
|
|
|
|
<programlisting>$ systemd-analyze condition 'ConditionKernelVersion = ! <4.0' \
|
|
'ConditionKernelVersion = >=5.1' \
|
|
'ConditionACPower=|false' \
|
|
'ConditionArchitecture=|!arm' \
|
|
'AssertPathExists=/etc/os-release'
|
|
test.service: AssertPathExists=/etc/os-release succeeded.
|
|
Asserts succeeded.
|
|
test.service: ConditionArchitecture=|!arm succeeded.
|
|
test.service: ConditionACPower=|false failed.
|
|
test.service: ConditionKernelVersion=>=5.1 succeeded.
|
|
test.service: ConditionKernelVersion=!<4.0 succeeded.
|
|
Conditions succeeded.</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze syscall-filter <optional><replaceable>SET</replaceable>...</optional></command></title>
|
|
|
|
<para>This command will list system calls contained in the specified system call set
|
|
<replaceable>SET</replaceable>, or all known sets if no sets are specified. Argument
|
|
<replaceable>SET</replaceable> must include the <literal>@</literal> prefix.</para>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze calendar <replaceable>EXPRESSION</replaceable>...</command></title>
|
|
|
|
<para>This command will parse and normalize repetitive calendar time events, and will calculate when
|
|
they elapse next. This takes the same input as the <varname>OnCalendar=</varname> setting in
|
|
<citerefentry><refentrytitle>systemd.timer</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
following the syntax described in
|
|
<citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>. By
|
|
default, only the next time the calendar expression will elapse is shown; use
|
|
<option>--iterations=</option> to show the specified number of next times the expression
|
|
elapses. Each time the expression elapses forms a timestamp, see the <command>timestamp</command>
|
|
verb below.</para>
|
|
|
|
<example>
|
|
<title>Show leap days in the near future</title>
|
|
|
|
<programlisting>$ systemd-analyze calendar --iterations=5 '*-2-29 0:0:0'
|
|
Original form: *-2-29 0:0:0
|
|
Normalized form: *-02-29 00:00:00
|
|
Next elapse: Sat 2020-02-29 00:00:00 UTC
|
|
From now: 11 months 15 days left
|
|
Iter. #2: Thu 2024-02-29 00:00:00 UTC
|
|
From now: 4 years 11 months left
|
|
Iter. #3: Tue 2028-02-29 00:00:00 UTC
|
|
From now: 8 years 11 months left
|
|
Iter. #4: Sun 2032-02-29 00:00:00 UTC
|
|
From now: 12 years 11 months left
|
|
Iter. #5: Fri 2036-02-29 00:00:00 UTC
|
|
From now: 16 years 11 months left
|
|
</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze timestamp <replaceable>TIMESTAMP</replaceable>...</command></title>
|
|
|
|
<para>This command parses a timestamp (i.e. a single point in time) and outputs the normalized form and
|
|
the difference between this timestamp and now. The timestamp should adhere to the syntax documented in
|
|
<citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
|
section "PARSING TIMESTAMPS".</para>
|
|
|
|
<example>
|
|
<title>Show parsing of timestamps</title>
|
|
|
|
<programlisting>$ systemd-analyze timestamp yesterday now tomorrow
|
|
Original form: yesterday
|
|
Normalized form: Mon 2019-05-20 00:00:00 CEST
|
|
(in UTC): Sun 2019-05-19 22:00:00 UTC
|
|
UNIX seconds: @15583032000
|
|
From now: 1 day 9h ago
|
|
|
|
Original form: now
|
|
Normalized form: Tue 2019-05-21 09:48:39 CEST
|
|
(in UTC): Tue 2019-05-21 07:48:39 UTC
|
|
UNIX seconds: @1558424919.659757
|
|
From now: 43us ago
|
|
|
|
Original form: tomorrow
|
|
Normalized form: Wed 2019-05-22 00:00:00 CEST
|
|
(in UTC): Tue 2019-05-21 22:00:00 UTC
|
|
UNIX seconds: @15584760000
|
|
From now: 14h left
|
|
</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze timespan <replaceable>EXPRESSION</replaceable>...</command></title>
|
|
|
|
<para>This command parses a time span (i.e. a difference between two timestamps) and outputs the
|
|
normalized form and the equivalent value in microseconds. The time span should adhere to the syntax
|
|
documented in
|
|
<citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
|
section "PARSING TIME SPANS". Values without units are parsed as seconds.</para>
|
|
|
|
<example>
|
|
<title>Show parsing of timespans</title>
|
|
|
|
<programlisting>$ systemd-analyze timespan 1s 300s '1year 0.000001s'
|
|
Original: 1s
|
|
μs: 1000000
|
|
Human: 1s
|
|
|
|
Original: 300s
|
|
μs: 300000000
|
|
Human: 5min
|
|
|
|
Original: 1year 0.000001s
|
|
μs: 31557600000001
|
|
Human: 1y 1us
|
|
</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze cat-config</command>
|
|
<replaceable>NAME</replaceable>|<replaceable>PATH</replaceable>...</title>
|
|
|
|
<para>This command is similar to <command>systemctl cat</command>, 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 <filename>/etc/systemd/logind.conf</filename> or
|
|
<filename>/usr/lib/systemd/logind.conf</filename>), or a name relative to the prefix (such as
|
|
<filename>systemd/logind.conf</filename>).</para>
|
|
|
|
<example>
|
|
<title>Showing logind configuration</title>
|
|
<programlisting>$ 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
|
|
</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze verify <replaceable>FILE</replaceable>...</command></title>
|
|
|
|
<para>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. The variable <varname>$SYSTEMD_UNIT_PATH</varname> is supported, and may be used to replace or
|
|
augment the compiled in set of unit load paths; see
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>. All
|
|
units files present in the directories containing the command line arguments will be used in preference
|
|
to the other paths.</para>
|
|
|
|
<para>The following errors are currently detected:</para>
|
|
<itemizedlist>
|
|
<listitem><para>unknown sections and directives,</para></listitem>
|
|
|
|
<listitem><para>missing dependencies which are required to start the given unit,</para></listitem>
|
|
|
|
<listitem><para>man pages listed in <varname>Documentation=</varname> which are not found in the
|
|
system,</para></listitem>
|
|
|
|
<listitem><para>commands listed in <varname>ExecStart=</varname> and similar which are not found in
|
|
the system or not executable.</para></listitem>
|
|
</itemizedlist>
|
|
|
|
<example>
|
|
<title>Misspelt directives</title>
|
|
|
|
<programlisting>$ 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
|
|
</programlisting>
|
|
</example>
|
|
|
|
<example>
|
|
<title>Missing service units</title>
|
|
|
|
<programlisting>$ 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.
|
|
</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title><command>systemd-analyze security <optional><replaceable>UNIT</replaceable>...</optional></command></title>
|
|
|
|
<para>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.</para>
|
|
|
|
<para>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.</para>
|
|
|
|
<example>
|
|
<title>Analyze <filename index="false">systemd-logind.service</filename></title>
|
|
|
|
<programlisting>$ 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 🙂
|
|
</programlisting>
|
|
</example>
|
|
</refsect2>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Options</title>
|
|
|
|
<para>The following options are understood:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><option>--system</option></term>
|
|
|
|
<listitem><para>Operates on the system systemd instance. This
|
|
is the implied default.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--user</option></term>
|
|
|
|
<listitem><para>Operates on the user systemd
|
|
instance.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--global</option></term>
|
|
|
|
<listitem><para>Operates on the system-wide configuration for
|
|
user systemd instance.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--order</option></term>
|
|
<term><option>--require</option></term>
|
|
|
|
<listitem><para>When used in conjunction with the
|
|
<command>dot</command> command (see above), selects which
|
|
dependencies are shown in the dependency graph. If
|
|
<option>--order</option> is passed, only dependencies of type
|
|
<varname>After=</varname> or <varname>Before=</varname> are
|
|
shown. If <option>--require</option> is passed, only
|
|
dependencies of type <varname>Requires=</varname>,
|
|
<varname>Requisite=</varname>,
|
|
<varname>Wants=</varname> and <varname>Conflicts=</varname>
|
|
are shown. If neither is passed, this shows dependencies of
|
|
all these types.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--from-pattern=</option></term>
|
|
<term><option>--to-pattern=</option></term>
|
|
|
|
<listitem><para>When used in conjunction with the
|
|
<command>dot</command> command (see above), this selects which
|
|
relationships are shown in the dependency graph. Both options
|
|
require a
|
|
<citerefentry project='man-pages'><refentrytitle>glob</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
pattern as an argument, which will be matched against the
|
|
left-hand and the right-hand, respectively, nodes of a
|
|
relationship.</para>
|
|
|
|
<para>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.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--fuzz=</option><replaceable>timespan</replaceable></term>
|
|
|
|
<listitem><para>When used in conjunction with the
|
|
<command>critical-chain</command> command (see above), also
|
|
show units, which finished <replaceable>timespan</replaceable>
|
|
earlier, than the latest unit in the same level. The unit of
|
|
<replaceable>timespan</replaceable> is seconds unless
|
|
specified with a different unit, e.g.
|
|
"50ms".</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--man=no</option></term>
|
|
|
|
<listitem><para>Do not invoke
|
|
<citerefentry project='man-pages'><refentrytitle>man</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
to verify the existence of man pages listed in <varname>Documentation=</varname>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--generators</option></term>
|
|
|
|
<listitem><para>Invoke unit generators, see
|
|
<citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
|
|
Some generators require root privileges. Under a normal user, running with
|
|
generators enabled will generally result in some warnings.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--recursive-errors=<replaceable>MODE</replaceable></option></term>
|
|
|
|
<listitem><para>Control verification of units and their dependencies and whether
|
|
<command>systemd-analyze verify</command> exits with a non-zero process exit status or not. With
|
|
<command>yes</command>, return a non-zero process exit status when warnings arise during verification
|
|
of either the specified unit or any of its associated dependencies. This is the default. With
|
|
<command>no</command>, return a non-zero process exit status when warnings arise during verification
|
|
of only the specified unit. With <command>one</command>, return a non-zero process exit status when
|
|
warnings arise during verification of either the specified unit or its immediate dependencies. </para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--root=<replaceable>PATH</replaceable></option></term>
|
|
|
|
<listitem><para>With <command>cat-files</command> and <command>verify</command>,
|
|
operate on files underneath the specified root path <replaceable>PATH</replaceable>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--image=<replaceable>PATH</replaceable></option></term>
|
|
|
|
<listitem><para>With <command>cat-files</command> and <command>verify</command>,
|
|
operate on files inside the specified image path <replaceable>PATH</replaceable>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--offline=<replaceable>BOOL</replaceable></option></term>
|
|
|
|
<listitem><para>With <command>security</command>, perform an offline security review
|
|
of the specified unit file(s), i.e. does not have to rely on PID 1 to acquire security
|
|
information for the files like the <command>security</command> verb when used by itself does.
|
|
This means that <option>--offline=</option> can be used with <option>--root=</option> and
|
|
<option>--image=</option> as well. If a unit's overall exposure level is above that set by
|
|
<option>--threshold=</option> (default value is 100), <option>--offline=</option> will return
|
|
an error.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--threshold=<replaceable>NUMBER</replaceable></option></term>
|
|
|
|
<listitem><para>With <command>security</command>, allow the user to set a custom value
|
|
to compare the overall exposure level with, for the specified unit file(s). If a unit's
|
|
overall exposure level, is greater than that set by the user, <command>security</command>
|
|
will return an error. <option>--threshold=</option> can be used with <option>--offline=</option>
|
|
as well and its default value is 100.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--security-policy=<replaceable>PATH</replaceable></option></term>
|
|
|
|
<listitem><para>With <command>security</command>, allow the user to define a custom set of
|
|
requirements formatted as a JSON file against which to compare the specified unit file(s)
|
|
and determine their overall exposure level to security threats.</para>
|
|
|
|
<table>
|
|
<title>Accepted Assessment Test Identifiers</title>
|
|
|
|
<tgroup cols='1'>
|
|
<colspec colname='directive' />
|
|
<thead>
|
|
<row>
|
|
<entry>Assessment Test Identifier</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry>UserOrDynamicUser</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SupplementaryGroups</entry>
|
|
</row>
|
|
<row>
|
|
<entry>PrivateMounts</entry>
|
|
</row>
|
|
<row>
|
|
<entry>PrivateDevices</entry>
|
|
</row>
|
|
<row>
|
|
<entry>PrivateTmp</entry>
|
|
</row>
|
|
<row>
|
|
<entry>PrivateNetwork</entry>
|
|
</row>
|
|
<row>
|
|
<entry>PrivateUsers</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectControlGroups</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectKernelModules</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectKernelTunables</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectKernelLogs</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectClock</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectHome</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectHostname</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectSystem</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RootDirectoryOrRootImage</entry>
|
|
</row>
|
|
<row>
|
|
<entry>LockPersonality</entry>
|
|
</row>
|
|
<row>
|
|
<entry>MemoryDenyWriteExecute</entry>
|
|
</row>
|
|
<row>
|
|
<entry>NoNewPrivileges</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_ADMIN</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SET_UID_GID_PCAP</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_PTRACE</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_TIME</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_NET_ADMIN</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_RAWIO</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_MODULE</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_AUDIT</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYSLOG</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_NICE_RESOURCE</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_MKNOD</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_CHOWN_FSETID_SETFCAP</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_DAC_FOWNER_IPC_OWNER</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_KILL</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_NET_BIND_SERVICE_BROADCAST_RAW</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_BOOT</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_MAC</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_LINUX_IMMUTABLE</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_IPC_LOCK</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_CHROOT</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_BLOCK_SUSPEND</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_WAKE_ALARM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_LEASE</entry>
|
|
</row>
|
|
<row>
|
|
<entry>CapabilityBoundingSet_CAP_SYS_TTY_CONFIG</entry>
|
|
</row>
|
|
<row>
|
|
<entry>UMask</entry>
|
|
</row>
|
|
<row>
|
|
<entry>KeyringMode</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProtectProc</entry>
|
|
</row>
|
|
<row>
|
|
<entry>ProcSubset</entry>
|
|
</row>
|
|
<row>
|
|
<entry>NotifyAccess</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RemoveIPC</entry>
|
|
</row>
|
|
<row>
|
|
<entry>Delegate</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictRealtime</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictSUIDSGID</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictNamespaces_user</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictNamespaces_mnt</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictNamespaces_ipc</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictNamespaces_pid</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictNamespaces_cgroup</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictNamespaces_uts</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictNamespaces_net</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictAddressFamilies_AF_INET_INET6</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictAddressFamilies_AF_UNIX</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictAddressFamilies_AF_NETLINK</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictAddressFamilies_AF_PACKET</entry>
|
|
</row>
|
|
<row>
|
|
<entry>RestrictAddressFamilies_OTHER</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallArchitectures</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_swap</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_obsolete</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_clock</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_cpu_emulation</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_debug</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_mount</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_module</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_raw_io</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_reboot</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_privileged</entry>
|
|
</row>
|
|
<row>
|
|
<entry>SystemCallFilter_resources</entry>
|
|
</row>
|
|
<row>
|
|
<entry>IPAddressDeny</entry>
|
|
</row>
|
|
<row>
|
|
<entry>DeviceAllow</entry>
|
|
</row>
|
|
<row>
|
|
<entry>AmbientCapabilities</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
|
|
<example>
|
|
<title>JSON Policy</title>
|
|
<para>The JSON file passed as a path parameter to <option>--security-policy=</option>
|
|
has a top-level JSON object, with keys being the assessment test identifiers mentioned
|
|
above. The values in the file should be JSON objects with one or more of the
|
|
following fields: description_na (string), description_good (string), description_bad
|
|
(string), weight (unsigned integer), and range (unsigned integer). If any of these fields
|
|
corresponding to a specific id of the unit file is missing from the JSON object, the
|
|
default built-in field value corresponding to that same id is used for security analysis
|
|
as default. The weight and range fields are used in determining the overall exposure level
|
|
of the unit files so by allowing users to manipulate these fields, 'security' gives them
|
|
the option to decide for themself which ids are more important and hence, should have a greater
|
|
effect on the exposure level. </para>
|
|
|
|
<programlisting>
|
|
{
|
|
"PrivateDevices":
|
|
{
|
|
"description_good": "Service has no access to hardware devices",
|
|
"description_bad": "Service potentially has access to hardware devices",
|
|
"weight": 1000,
|
|
"range": 1
|
|
},
|
|
"PrivateMounts":
|
|
{
|
|
"description_good": "Service cannot install system mounts",
|
|
"description_bad": "Service may install system mounts",
|
|
"weight": 1000,
|
|
"range": 1
|
|
},
|
|
"PrivateNetwork":
|
|
{
|
|
"description_good": "Service has no access to the host's network",
|
|
"description_bad": "Service has access to the host's network",
|
|
"weight": 2500,
|
|
"range": 1
|
|
},
|
|
"PrivateTmp":
|
|
{
|
|
"description_good": "Service has no access to other software's temporary files",
|
|
"description_bad": "Service has access to other software's temporary files",
|
|
"weight": 1000,
|
|
"range": 1
|
|
},
|
|
"PrivateUsers":
|
|
{
|
|
"description_good": "Service does not have access to other users",
|
|
"description_bad": "Service has access to other users",
|
|
"weight": 1000,
|
|
"range": 1
|
|
}
|
|
}
|
|
</programlisting>
|
|
</example>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
|
|
<varlistentry>
|
|
<term><option>--json=<replaceable>MODE</replaceable></option></term>
|
|
|
|
<listitem><para>With the <command>security</command> command, generate a JSON formatted
|
|
output of the security analysis table. The format is a JSON array with objects
|
|
containing the following fields: <varname>set</varname> which indicates if the setting has
|
|
been enabled or not, <varname>name</varname> which is what is used to refer to the setting,
|
|
<varname>json_field</varname> which is the JSON compatible identifier of the setting,
|
|
<varname>description</varname> which is an outline of the setting state, and
|
|
<varname>exposure</varname> which is a number in the range 0.0…10.0, where a higher value
|
|
corresponds to a higher security threat. The JSON version of the table is printed to standard
|
|
output. The <replaceable>MODE</replaceable> passed to the option can be one of three:
|
|
<option>off</option> which is the default, <option>pretty</option> and <option>short</option>
|
|
which respectively output a prettified or shorted JSON version of the security table.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--iterations=<replaceable>NUMBER</replaceable></option></term>
|
|
|
|
<listitem><para>When used with the <command>calendar</command> command, show the specified number of
|
|
iterations the specified calendar expression will elapse next. Defaults to 1.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--base-time=<replaceable>TIMESTAMP</replaceable></option></term>
|
|
|
|
<listitem><para>When used with the <command>calendar</command> command, show next iterations relative
|
|
to the specified point in time. If not specified defaults to the current time.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--unit=<replaceable>UNIT</replaceable></option></term>
|
|
|
|
<listitem><para>When used with the <command>condition</command> command, evaluate all the
|
|
<varname index="false">Condition*=...</varname> and <varname index="false">Assert*=...</varname>
|
|
assignments in the specified unit file. The full unit search path is formed by combining the
|
|
directories for the specified unit with the usual unit load paths. The variable
|
|
<varname>$SYSTEMD_UNIT_PATH</varname> is supported, and may be used to replace or augment the
|
|
compiled in set of unit load paths; see
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>. All
|
|
units files present in the directory containing the specified unit will be used in preference to the
|
|
other paths.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<xi:include href="user-system-options.xml" xpointer="host" />
|
|
<xi:include href="user-system-options.xml" xpointer="machine" />
|
|
|
|
<xi:include href="standard-options.xml" xpointer="help" />
|
|
<xi:include href="standard-options.xml" xpointer="version" />
|
|
<xi:include href="standard-options.xml" xpointer="no-pager" />
|
|
</variablelist>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Exit status</title>
|
|
|
|
<para>On success, 0 is returned, a non-zero failure code
|
|
otherwise.</para>
|
|
</refsect1>
|
|
|
|
<xi:include href="common-variables.xml" />
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|