"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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+ SPDX-License-Identifier: LGPL-2.1+
+
This file is part of systemd.
Copyright 2012 Lennart Poettering
-
- 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
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- systemd is distributed in the hope that it will be useful, but
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- Lesser General Public License for more details.
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- You should have received a copy of the GNU Lesser General Public License
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-->
<refentry id="journalctl"
<varlistentry>
<term>
- <option>short-precise</option>
+ <option>short-iso-precise</option>
</term>
<listitem>
- <para>is very similar, but shows timestamps with full
+ <para>as for <option>short-iso</option> but includes full
microsecond precision.</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term>
+ <option>short-precise</option>
+ </term>
+ <listitem>
+ <para>is very similar, but shows classic syslog timestamps
+ with full microsecond precision.</para>
+ </listitem>
+ </varlistentry>
+
<varlistentry>
<term>
<option>short-monotonic</option>
<para>serializes the journal into a binary (but mostly
text-based) stream suitable for backups and network
transfer (see
- <ulink url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal Export Format</ulink>
- for more information).</para>
+ <ulink url="https://www.freedesktop.org/wiki/Software/systemd/export">Journal Export Format</ulink>
+ for more information). To import the binary stream back
+ into native journald format use
+ <citerefentry><refentrytitle>systemd-journal-remote</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<listitem>
<para>formats entries as JSON data structures, one per
line (see
- <ulink url="http://www.freedesktop.org/wiki/Software/systemd/json">Journal JSON Format</ulink>
+ <ulink url="https://www.freedesktop.org/wiki/Software/systemd/json">Journal JSON Format</ulink>
for more information).</para>
</listitem>
</varlistentry>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>--output-fields=</option></term>
+
+ <listitem><para>A comma separated list of the fields which should
+ be included in the output. This only has an effect for the output modes
+ which would normally show all fields (<option>verbose</option>,
+ <option>export</option>, <option>json</option>,
+ <option>json-pretty</option>, and <option>json-sse</option>). The
+ <literal>__CURSOR</literal>, <literal>__REALTIME_TIMESTAMP</literal>,
+ <literal>__MONOTONIC_TIMESTAMP</literal>, and
+ <literal>_BOOT_ID</literal> fields are always
+ printed.</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>--utc</option></term>
manuals. Note that help texts are not available for all
messages, but only for selected ones. For more information on
the message catalog, please refer to the
- <ulink url="http://www.freedesktop.org/wiki/Software/systemd/catalog">Message Catalog Developer Documentation</ulink>.</para>
+ <ulink url="https://www.freedesktop.org/wiki/Software/systemd/catalog">Message Catalog Developer Documentation</ulink>.</para>
<para>Note: when attaching <command>journalctl</command>
output to bug reports, please do <emphasis>not</emphasis> use
<term><option>-q</option></term>
<term><option>--quiet</option></term>
- <listitem><para>Suppresses all info messages
- (i.e. "-- Logs begin at ...", "-- Reboot --"),
+ <listitem><para>Suppresses all informational messages
+ (i.e. "-- Logs begin at …", "-- Reboot --"),
any warning messages regarding
inaccessible system journals when run as a normal
user.</para></listitem>
priorities.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>-g</option></term>
+ <term><option>--grep=</option></term>
+
+ <listitem><para>Filter output to entries where the <varname>MESSAGE=</varname>
+ field matches the specified regular expression. PERL-compatible regular expressions
+ are used, see
+ <citerefentry><refentrytitle>pcre2pattern</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ for a detailed description of the syntax.</para>
+
+ <para>If the pattern is all lowercase, matching is case insensitive.
+ Otherwise, matching is case sensitive. This can be overridden with the
+ <option>--case-sensitive</option> option, see below.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--case-sensitive<optional>=BOOLEAN</optional></option></term>
+
+ <listitem><para>Make pattern matching case sensitive or case insenstive.</para>
+ </listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>-c</option></term>
<term><option>--cursor=</option></term>
<listitem><para>The cursor is shown after the last entry after
two dashes:</para>
- <programlisting>-- cursor: s=0639...</programlisting>
+ <programlisting>-- cursor: s=0639…</programlisting>
<para>The format of the cursor is private
and subject to change.</para></listitem>
</varlistentry>
a new 128-bit ID suitable for identifying messages. This is
intended for usage by developers who need a new identifier for
a new message they introduce and want to make
- recognizable. This will print the new ID in three different
+ recognizable. This will print the new ID in four different
formats which can be copied into source code or similar.
</para></listitem>
</varlistentry>
<term><option>--vacuum-time=</option></term>
<term><option>--vacuum-files=</option></term>
- <listitem><para>Removes archived journal files until the disk
+ <listitem><para>Removes the oldest archived journal files until the disk
space they use falls below the specified size (specified with
the usual <literal>K</literal>, <literal>M</literal>,
<literal>G</literal> and <literal>T</literal> suffixes), or all
<varlistentry>
<term><option>--list-catalog
- <optional><replaceable>128-bit-ID...</replaceable></optional>
+ <optional><replaceable>128-bit-ID…</replaceable></optional>
</option></term>
<listitem><para>List the contents of the message catalog as a
<varlistentry>
<term><option>--dump-catalog
- <optional><replaceable>128-bit-ID...</replaceable></optional>
+ <optional><replaceable>128-bit-ID…</replaceable></optional>
</option></term>
<listitem><para>Show the contents of the message catalog, with
<para>With one match specified, all entries with a field matching
the expression are shown:</para>
- <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service</programlisting>
+ <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service
+journalctl _SYSTEMD_CGROUP=/user.slice/user-42.slice/session-c1.scope</programlisting>
<para>If two different fields are matched, only entries matching
both expressions at the same time are shown:</para>
<programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097 + _SYSTEMD_UNIT=dbus.service</programlisting>
+ <para>To show all fields emited <emphasis>by</emphasis> a unit and <emphasis>about</emphasis>
+ the unit, option <option>-u</option>/<option>--unit=</option> should be used.
+ <command>journalctl -u <replaceable>name</replaceable></command>
+ expands to a complex filter similar to
+ <programlisting>_SYSTEMD_UNIT=<replaceable>name</replaceable>.service
+ + UNIT=<replaceable>name</replaceable>.service _PID=1
+ + OBJECT_SYSTEMD_UNIT=<replaceable>name</replaceable>.service _UID=0
+ + COREDUMP_UNIT=<replaceable>name</replaceable>.service _UID=0 MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1
+ </programlisting>
+ (see <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for an explanation of those patterns).
+ </para>
+
<para>Show all logs generated by the D-Bus executable:</para>
<programlisting>journalctl /usr/bin/dbus-daemon</programlisting>
<citerefentry><refentrytitle>coredumpctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-journal-remote</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-journal-upload</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
projects / thirdparty / systemd.git / blobdiff