<term><option>--lines=</option></term>
<term><option>-n</option></term>
- <listitem><para>Controls the number of
- journal lines to show, counting from
- the most recent ones. The argument is
- optional, and if specified is a
- positive integer. If not specified and
- in follow mode defaults to 10. If this
- option is not passed and follow mode
- is not enabled, how many lines are
- shown is not
- limited.</para></listitem>
+ <listitem><para>Show the most recent
+ 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>
</varlistentry>
<varlistentry>
information). <literal>json</literal>
formats entries as JSON data
structures, one per
- line. <literal>json-pretty</literal>
+ line (see <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/json">Journal
+ JSON Format</ulink> for more
+ information). <literal>json-pretty</literal>
also formats entries as JSON data
structures, but formats them in
multiple lines in order to make them
<term><option>-b</option></term>
<listitem><para>Show data only from
- current boot.</para></listitem>
+ current boot. This will add a match
+ for <literal>_BOOT_ID=</literal> for
+ the current boot ID of the
+ kernel.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--unit=</option></term>
+ <term><option>-u</option></term>
+
+ <listitem><para>Show data only of the
+ specified unit. This will add a match
+ for <literal>_SYSTEMD_UNIT=</literal>
+ for the specified
+ unit.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>-p</option></term>
+ <term><option>--priority=</option></term>
+
+ <listitem><para>Filter output by
+ message priorities or priority
+ ranges. Takes either a single numeric
+ or textual log level (i.e. between
+ 0/<literal>emerg</literal> and
+ 7/<literal>debug</literal>), or a
+ range of numeric/text log levels in
+ the form FROM..TO. The log levels are
+ the usual syslog log levels as
+ documented in
+ <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ i.e. <literal>emerg</literal> (0),
+ <literal>alert</literal> (1),
+ <literal>crit</literal> (2),
+ <literal>err</literal> (3),
+ <literal>warning</literal> (4),
+ <literal>notice</literal> (5),
+ <literal>info</literal> (6),
+ <literal>debug</literal> (7). If a
+ single log level is specified all
+ messages with this log level or a
+ lower (hence more important) log level
+ are shown. If a range is specified all
+ messages within the range are shown,
+ including both the start and the end
+ value of the range. This will add
+ <literal>PRIORITY=</literal> matches
+ for the specified
+ priorities.</para></listitem>
</varlistentry>
<varlistentry>
time, respectively.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>--field=</option></term>
+ <term><option>-F</option></term>
+
+ <listitem><para>Print all possible
+ data values the specified field can
+ take in all entries of the
+ journal.</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>--directory=</option></term>
<term><option>-D</option></term>
paths.</para></listitem>
</varlistentry>
- <varlistentry>
- <term><option>-p</option></term>
- <term><option>--priority=</option></term>
-
- <listitem><para>Filter output by
- message priorities or priority
- ranges. Takes either a single numeric
- or textual log level (i.e. between
- 0/<literal>emerg</literal> and
- 7/<literal>debug</literal>), or a
- range of numeric/text log levels in
- the form FROM..TO. The log levels are
- the usual syslog log levels as
- documented in
- <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- i.e. <literal>emerg</literal> (0),
- <literal>alert</literal> (1),
- <literal>crit</literal> (2),
- <literal>err</literal> (3),
- <literal>warning</literal> (4),
- <literal>notice</literal> (5),
- <literal>info</literal> (6),
- <literal>debug</literal> (7). If a
- single log level is specified all
- messages with this log level or a
- lower (hence more important) log level
- are shown. If a range is specified all
- messages within the range are shown,
- including both the start and the end
- value of the range.</para></listitem>
- </varlistentry>
-
<varlistentry>
<term><option>--new-id128</option></term>
~ianmdlvl / elogind.git / blobdiff