along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
-<refentry id="journalctl">
+<refentry id="journalctl"
+ xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>journalctl</title>
field, then they are automatically matched as
alternatives, i.e. the resulting output will show
entries matching any of the specified matches for the
- same field. Finally, if the character
- <literal>+</literal> appears as separate word on the
- command line, all matches before and after are combined
- in a disjunction (i.e. logical OR).</para>
+ same field. Finally, the character
+ <literal>+</literal> may appears as a separate word
+ between other terms on the command line. This causes
+ all matches before and after to be combined in a
+ disjunction (i.e. logical OR).</para>
<para>As shortcuts for a few types of field/value
matches, file paths may be specified. If a file path
<literal>_KERNEL_DEVICE=</literal> match for the
device.</para>
+ <para>Additional constraints may be added using options
+ <option>--boot</option>, <option>--unit=</option>,
+ etc, to further limit what entries will be shown
+ (logical AND).</para>
+
<para>Output is interleaved from all accessible
journal files, whether they are rotated or currently
being written, and regardless of whether they belong to the
system itself or are accessible user journals.</para>
+ <para>The set of journal files which will be used
+ can be modified using the <option>--user</option>,
+ <option>--system</option>, <option>--directory</option>,
+ and <option>--file</option> options, see below.</para>
+
<para>All users are granted access to their private
per-user journals. However, by default, only root and
- users who are members of the <literal>adm</literal>
+ users who are members of the <literal>systemd-journal</literal>
group get access to the system journal and the
journals of other users.</para>
<command>less</command> by default, and long lines are
"truncated" to screen width. The hidden part can be
viewed by using the left-arrow and right-arrow
- keys. Paging can be disabled, see
- <option>--no-pager</option> and section Environment
- below.</para>
+ keys. Paging can be disabled; see the
+ <option>--no-pager</option> option and the "Environment"
+ section below.</para>
- <para>When outputing to a tty, lines are colored
+ <para>When outputting to a tty, lines are colored
according to priority: lines of level ERROR and higher
- are colored red, lines of level NOTICE and higher are
- highlighted, and other lines are displayed normally.
+ are colored red; lines of level NOTICE and higher are
+ highlighted; other lines are displayed normally.
</para>
</refsect1>
<variablelist>
<varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
-
- <listitem><para>Prints a short help
- text and exits.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>--version</option></term>
-
- <listitem><para>Prints a short version
- string and exits.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>--no-pager</option></term>
-
- <listitem><para>Do not pipe output into a
- pager.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>-l</option></term>
+ <term><option>--no-full</option></term>
<term><option>--full</option></term>
+ <term><option>-l</option></term>
+
+ <listitem><para>Ellipsize fields when
+ they do not fit in available columns.
+ The default is to show full fields,
+ allowing them to wrap or be truncated
+ by the pager, if one is used.</para>
- <listitem><para>Show all (printable) fields in
- full.</para></listitem>
+ <para>The old options
+ <option>-l</option>/<option>--full</option>
+ are not useful anymore, except to undo
+ <option>--no-full</option>.</para></listitem>
</varlistentry>
<varlistentry>
that the pager will not buffer logs of
unbounded size. This may be overridden
with an explicit <option>-n</option>
- with some other numeric value on the
- command line. Note that this option is
- only supported for the
- <citerefentry><refentrytitle>less</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ with some other numeric value while
+ <option>-nall</option> will disable this cap.
+ Note that this option is only supported for the
+ <citerefentry project='man-pages'><refentrytitle>less</refentrytitle><manvolnum>1</manvolnum></citerefentry>
pager.</para></listitem>
</varlistentry>
journal events and limit the number of
events shown. If
<option>--follow</option> is used,
- this option is implied. The argument,
- a positive integer, is optional, and
- defaults to 10. </para></listitem>
+ this option is implied. The argument is
+ a positive integer or <literal>all</literal>
+ to disable line limiting. The default value is
+ 10 if no argument is given.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-r</option></term>
<term><option>--reverse</option></term>
- <listitem><para>Reverse output, so the newest
+ <listitem><para>Reverse output so that the newest
entries are displayed first.</para></listitem>
</varlistentry>
<varlistentry>
<term>
- <option>short-monotonic</option>
+ <option>short-iso</option>
</term>
<listitem>
- <para>is very similar
- but shows monotonic
- timestamps instead of
+ <para>is very similar,
+ but shows ISO 8601
wallclock timestamps.
</para>
</listitem>
<varlistentry>
<term>
- <option>short-iso</option>
+ <option>short-precise</option>
</term>
<listitem>
- <para>is very similar
- but shows ISO 8601
+ <para>is very similar,
+ but shows timestamps
+ with full microsecond
+ precision.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>short-monotonic</option>
+ </term>
+ <listitem>
+ <para>is very similar,
+ but shows monotonic
+ timestamps instead of
wallclock timestamps.
</para>
</listitem>
but formats them in
multiple lines in order
to make them more
- readable for humans.</para>
+ readable by humans.</para>
</listitem>
</varlistentry>
</term>
<listitem>
<para>generates a very
- terse output only
+ terse output, only
showing the actual
message of each journal
- entry with no meta data,
+ entry with no metadata,
not even a timestamp.
</para>
</listitem>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>--utc</option></term>
+
+ <listitem><para>Express time in Coordinated Universal
+ Time (UTC).</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>-x</option></term>
<term><option>--catalog</option></term>
context of an error or log event,
possible solutions, as well as
pointers to support forums, developer
- documentation and any other relevant
+ documentation, and any other relevant
manuals. Note that help texts are not
available for all messages, but only
for selected ones. For more
please refer to the <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/catalog">Message
Catalog Developer
- Documentation</ulink>.</para></listitem>
+ Documentation</ulink>.</para>
+
+ <para>Note: when attaching
+ <command>journalctl</command> output
+ to bug reports, please do
+ <emphasis>not</emphasis> use
+ <option>-x</option>.</para>
+ </listitem>
</varlistentry>
<varlistentry>
<term><option>--quiet</option></term>
<listitem><para>Suppresses any warning
- message regarding inaccessible system
- journals when run as normal
+ messages regarding inaccessible system
+ journals when run as a normal
user.</para></listitem>
</varlistentry>
<replaceable>offset</replaceable> will look up
boots starting from the end of the
journal. Thus, <constant>1</constant> means the
- first boot found in the journal in the
+ first boot found in the journal in
chronological order, <constant>2</constant> the
second and so on; while <constant>-0</constant>
is the last boot, <constant>-1</constant> the
- boot before that, and so on. An empty
+ boot before last, and so on. An empty
<replaceable>offset</replaceable> is equivalent
to specifying <constant>-0</constant>, except
when the current boot is not the last boot
specified to look at logs from a different
machine).</para>
- <para>If the 32 character
+ <para>If the 32-character
<replaceable>ID</replaceable> is specified, it
may optionally be followed by
<replaceable>offset</replaceable> which
values mean earlier boots and a positive values
mean later boots. If
<replaceable>offset</replaceable> is not
- specified, a value of zero is assumed and the
+ specified, a value of zero is assumed, and the
logs for the boot given by
<replaceable>ID</replaceable> are shown.
</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>--list-boots</option></term>
+
+ <listitem><para>Show a tabular list of
+ boot numbers (relative to the current
+ boot), their IDs, and the timestamps
+ of the first and last message
+ pertaining to the boot.
+ </para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>-k</option></term>
<term><option>--dmesg</option></term>
</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>-t</option></term>
+ <term><option>--identifier=<replaceable>SYSLOG_IDENTIFIER</replaceable>|<replaceable>PATTERN</replaceable></option></term>
+
+ <listitem><para>Show messages for the
+ specified syslog identifier
+ <replaceable>SYSLOG_IDENTIFIER</replaceable>, or
+ for any of the messages with a <literal>SYSLOG_IDENTIFIER</literal>
+ matched by <replaceable>PATTERN</replaceable>.</para>
+
+ <para>This parameter can be specified
+ multiple times.</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>-u</option></term>
- <term><option>--unit=</option></term>
+ <term><option>--unit=<replaceable>UNIT</replaceable>|<replaceable>PATTERN</replaceable></option></term>
<listitem><para>Show messages for the
- specified systemd unit. This will add
- a match for messages from the unit
- (<literal>_SYSTEMD_UNIT=</literal>)
- and additional matches for messages
- from systemd and messages about
- coredumps for the specified unit.</para>
- <para>This parameter can be specified multiple times.
- </para></listitem>
+ specified systemd unit
+ <replaceable>UNIT</replaceable> (such
+ as a service unit), or for any of the
+ units matched by
+ <replaceable>PATTERN</replaceable>.
+ If a pattern is specified, a list of
+ unit names found in the journal is
+ compared with the specified pattern
+ and all that match are used. For each
+ unit name, a match is added for
+ messages from the unit
+ (<literal>_SYSTEMD_UNIT=<replaceable>UNIT</replaceable></literal>),
+ along with additional matches for
+ messages from systemd and messages
+ about coredumps for the specified
+ unit.</para>
+
+ <para>This parameter can be specified
+ multiple times.</para></listitem>
</varlistentry>
<varlistentry>
the form FROM..TO. The log levels are
the usual syslog log levels as
documented in
- <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
i.e. <literal>emerg</literal> (0),
<literal>alert</literal> (1),
<literal>crit</literal> (2),
<varlistentry>
<term><option>--after-cursor=</option></term>
- <listitem><para>Start showing entries from the
- location in the journal
- <emphasis>after</emphasis> the location
- specified by the this cursor.
- </para></listitem>
+ <listitem><para>Start showing entries
+ from the location in the journal
+ <emphasis>after</emphasis> the
+ location specified by the this cursor.
+ The cursor is shown when the
+ <option>--show-cursor</option> option
+ is used.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--show-cursor</option></term>
+
+ <listitem><para>The cursor is shown after the last
+ entry after two dashes:</para>
+ <programlisting>-- cursor: s=0639...</programlisting>
+ <para>The format of the cursor is private
+ and subject to change.</para></listitem>
</varlistentry>
<varlistentry>
<listitem><para>Show messages from
system services and the kernel (with
- <option>--system</option>). Show
+ <option>--system</option>). Show
messages from service of current user
(with <option>--user</option>).
If neither is specified, show all
</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>-M</option></term>
+ <term><option>--machine=</option></term>
+
+ <listitem><para>Show messages from a
+ running, local container. Specify a
+ container name to connect
+ to.</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>-D <replaceable>DIR</replaceable></option></term>
<term><option>--directory=<replaceable>DIR</replaceable></option></term>
<varlistentry>
<term><option>--file=<replaceable>GLOB</replaceable></option></term>
- <listitem><para>Takes a file glob as
+ <listitem><para>Takes a file glob as an
argument. If specified, journalctl will
operate on the specified journal files
matching <replaceable>GLOB</replaceable>
<term><option>--root=<replaceable>ROOT</replaceable></option></term>
<listitem><para>Takes a directory path
- as argument. If specified, journalctl
+ as an argument. If specified, journalctl
will operate on catalog file hierarchy
underneath the specified directory
instead of the root directory
<term><option>--new-id128</option></term>
<listitem><para>Instead of showing
- journal contents, generate a new 128
- bit ID suitable for identifying
+ journal contents, generate 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
<varlistentry>
<term><option>--list-catalog
- <optional><replaceable>ID128...</replaceable></optional>
+ <optional><replaceable>128-bit-ID...</replaceable></optional>
</option></term>
<listitem><para>List the contents of
- the message catalog, as table of
- message IDs plus their short
+ the message catalog as a table of
+ message IDs, plus their short
description strings.</para>
<para>If any
- <replaceable>ID128</replaceable>s are
+ <replaceable>128-bit-ID</replaceable>s are
specified, only those entries are shown.
</para>
</listitem>
<varlistentry>
<term><option>--dump-catalog
- <optional><replaceable>ID128...</replaceable></optional>
+ <optional><replaceable>128-bit-ID...</replaceable></optional>
</option></term>
<listitem><para>Show the contents of
the message catalog, with entries
separated by a line consisting of two
- dashes and the id (the format is the
+ dashes and the ID (the format is the
same as <filename>.catalog</filename>
- files.</para>
+ files).</para>
<para>If any
- <replaceable>ID128</replaceable>s are
+ <replaceable>128-bit-ID</replaceable>s are
specified, only those entries are shown.
</para>
</listitem>
<listitem><para>Update the message
catalog index. This command needs to
be executed each time new catalog
- files are installed, removed or
+ files are installed, removed, or
updated to rebuild the binary catalog
index.</para></listitem>
</varlistentry>
sealing key is stored in the journal
data directory and shall remain on the
host. The verification key should be
- stored externally. Also see the
+ stored externally. Refer to the
<option>Seal=</option> option in
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
- for details.</para></listitem>
+ for information on Forward Secure
+ Sealing and for a link to a refereed
+ scholarly paper detailing the
+ cryptographic theory it is based on.
+ </para></listitem>
</varlistentry>
<varlistentry>
<term><option>--force</option></term>
- <listitem><para>When --setup-keys is passed and
- Forward Secure Sealing has already been set up,
- recreate FSS keys.</para></listitem>
+ <listitem><para>When
+ <option>--setup-keys</option> is passed and
+ Forward Secure Sealing (FSS) has already been
+ configured, recreate FSS keys.</para></listitem>
</varlistentry>
<varlistentry>
operation.</para></listitem>
</varlistentry>
+ <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>
+ <para>On success, 0 is returned; otherwise, a non-zero
+ failure code is returned.</para>
</refsect1>
- <refsect1>
- <title>Environment</title>
-
- <variablelist class='environment-variables'>
- <varlistentry>
- <term><varname>$SYSTEMD_PAGER</varname></term>
- <listitem><para>Pager to use when
- <option>--no-pager</option> is not given;
- overrides <varname>$PAGER</varname>. Setting
- this to an empty string or the value
- <literal>cat</literal> is equivalent to passing
- <option>--no-pager</option>.</para></listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
+ <xi:include href="less-variables.xml" />
<refsect1>
<title>Examples</title>
<programlisting>journalctl /dev/sda</programlisting>
- <para>Show all kernel logs from last boot:</para>
+ <para>Show all kernel logs from previous boot:</para>
+
+ <programlisting>journalctl -k -b -1</programlisting>
+
+ <para>Show a live log display from a system service <filename>apache.service</filename>:</para>
- <programlisting>journalctl -k -b :</programlisting>
+ <programlisting>journalctl -f -u apache</programlisting>
</refsect1>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <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>
</para>
~ianmdlvl / elogind.git / blobdiff