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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
4 | ||
5 | <!-- | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2012 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
2af777ba LP |
13 | (at your option) any later version. |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 18 | Lesser General Public License for more details. |
2af777ba | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
2af777ba LP |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | --> | |
23 | ||
169c4f65 | 24 | <refentry id="journalctl"> |
2af777ba LP |
25 | |
26 | <refentryinfo> | |
169c4f65 | 27 | <title>journalctl</title> |
2af777ba LP |
28 | <productname>systemd</productname> |
29 | ||
30 | <authorgroup> | |
31 | <author> | |
32 | <contrib>Developer</contrib> | |
33 | <firstname>Lennart</firstname> | |
34 | <surname>Poettering</surname> | |
35 | <email>lennart@poettering.net</email> | |
36 | </author> | |
37 | </authorgroup> | |
38 | </refentryinfo> | |
39 | ||
40 | <refmeta> | |
169c4f65 | 41 | <refentrytitle>journalctl</refentrytitle> |
2af777ba LP |
42 | <manvolnum>1</manvolnum> |
43 | </refmeta> | |
44 | ||
45 | <refnamediv> | |
169c4f65 | 46 | <refname>journalctl</refname> |
2af777ba LP |
47 | <refpurpose>Query the systemd journal</refpurpose> |
48 | </refnamediv> | |
49 | ||
50 | <refsynopsisdiv> | |
51 | <cmdsynopsis> | |
54b7254c ZJS |
52 | <command>journalctl</command> |
53 | <arg choice="opt" rep="repeat">OPTIONS</arg> | |
54 | <arg choice="opt" rep="repeat">MATCHES</arg> | |
2af777ba LP |
55 | </cmdsynopsis> |
56 | </refsynopsisdiv> | |
57 | ||
58 | <refsect1> | |
59 | <title>Description</title> | |
60 | ||
01cf0ca8 LP |
61 | <para><command>journalctl</command> may be used to |
62 | query the contents of the | |
2af777ba | 63 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
01cf0ca8 LP |
64 | journal as written by |
65 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
2af777ba | 66 | |
409dee2e | 67 | <para>If called without parameters, it will show the full |
2af777ba LP |
68 | contents of the journal, starting with the oldest |
69 | entry collected.</para> | |
70 | ||
409dee2e | 71 | <para>If one or more match arguments are passed, the |
cbdca852 LP |
72 | output is filtered accordingly. A match is in the |
73 | format <literal>FIELD=VALUE</literal>, | |
74 | e.g. <literal>_SYSTEMD_UNIT=httpd.service</literal>, | |
75 | referring to the components of a structured journal | |
76 | entry. See | |
ffa16db0 | 77 | <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry> |
cbdca852 | 78 | for a list of well-known fields. If multiple matches |
409dee2e | 79 | are specified matching different fields, the log |
cbdca852 LP |
80 | entries are filtered by both, i.e. the resulting output |
81 | will show only entries matching all the specified | |
82 | matches of this kind. If two matches apply to the same | |
83 | field, then they are automatically matched as | |
84 | alternatives, i.e. the resulting output will show | |
85 | entries matching any of the specified matches for the | |
86 | same field. Finally, if the character | |
909f413d | 87 | <literal>+</literal> appears as separate word on the |
409dee2e | 88 | command line, all matches before and after are combined |
cbdca852 | 89 | in a disjunction (i.e. logical OR).</para> |
2af777ba | 90 | |
b6a34514 | 91 | <para>As shortcuts for a few types of field/value |
409dee2e | 92 | matches, file paths may be specified. If a file path |
b6a34514 LP |
93 | refers to an executable file, this is equivalent to an |
94 | <literal>_EXE=</literal> match for the canonicalized | |
409dee2e | 95 | binary path. Similarly, if a path refers to a device |
b6a34514 LP |
96 | node, this is equivalent to a |
97 | <literal>_KERNEL_DEVICE=</literal> match for the | |
98 | device.</para> | |
99 | ||
2af777ba LP |
100 | <para>Output is interleaved from all accessible |
101 | journal files, whether they are rotated or currently | |
409dee2e | 102 | being written, and regardless of whether they belong to the |
2af777ba LP |
103 | system itself or are accessible user journals.</para> |
104 | ||
105 | <para>All users are granted access to their private | |
409dee2e | 106 | per-user journals. However, by default, only root and |
2af777ba LP |
107 | users who are members of the <literal>adm</literal> |
108 | group get access to the system journal and the | |
109 | journals of other users.</para> | |
77a9e8de ZJS |
110 | |
111 | <para>The output is paged through | |
112 | <command>less</command> by default, and long lines are | |
113 | "truncated" to screen width. The hidden part can be | |
114 | viewed by using the left-arrow and right-arrow | |
115 | keys. Paging can be disabled, see | |
116 | <option>--no-pager</option> and section Environment | |
117 | below.</para> | |
118 | ||
119 | <para>When outputing to a tty, lines are colored | |
120 | according to priority: lines of level ERROR and higher | |
121 | are colored red, lines of level NOTICE and higher are | |
122 | highlighted, and other lines are displayed normally. | |
123 | </para> | |
2af777ba LP |
124 | </refsect1> |
125 | ||
126 | <refsect1> | |
127 | <title>Options</title> | |
128 | ||
129 | <para>The following options are understood:</para> | |
130 | ||
131 | <variablelist> | |
132 | <varlistentry> | |
2af777ba | 133 | <term><option>-h</option></term> |
a7f5bb1e | 134 | <term><option>--help</option></term> |
2af777ba LP |
135 | |
136 | <listitem><para>Prints a short help | |
137 | text and exits.</para></listitem> | |
138 | </varlistentry> | |
139 | ||
140 | <varlistentry> | |
141 | <term><option>--version</option></term> | |
142 | ||
143 | <listitem><para>Prints a short version | |
144 | string and exits.</para></listitem> | |
145 | </varlistentry> | |
146 | ||
147 | <varlistentry> | |
148 | <term><option>--no-pager</option></term> | |
149 | ||
0e25e94e KS |
150 | <listitem><para>Do not pipe output into a |
151 | pager.</para></listitem> | |
152 | </varlistentry> | |
2af777ba | 153 | |
e3657ecd | 154 | <varlistentry> |
98a6e132 | 155 | <term><option>-l</option></term> |
e3657ecd ZJS |
156 | <term><option>--full</option></term> |
157 | ||
158 | <listitem><para>Show all (printable) fields in | |
159 | full.</para></listitem> | |
160 | </varlistentry> | |
161 | ||
2af777ba | 162 | <varlistentry> |
2af777ba | 163 | <term><option>-a</option></term> |
a7f5bb1e | 164 | <term><option>--all</option></term> |
2af777ba LP |
165 | |
166 | <listitem><para>Show all fields in | |
167 | full, even if they include unprintable | |
168 | characters or are very | |
169 | long.</para></listitem> | |
170 | </varlistentry> | |
171 | ||
172 | <varlistentry> | |
2af777ba | 173 | <term><option>-f</option></term> |
a7f5bb1e | 174 | <term><option>--follow</option></term> |
2af777ba | 175 | |
a0b78ede | 176 | <listitem><para>Show only the most recent |
49f43d5f | 177 | journal entries, and continuously print |
5c3246b1 LP |
178 | new entries as they are appended to |
179 | the journal.</para></listitem> | |
2af777ba LP |
180 | </varlistentry> |
181 | ||
1b12a7b5 HH |
182 | <varlistentry> |
183 | <term><option>-e</option></term> | |
184 | <term><option>--pager-end</option></term> | |
185 | ||
186 | <listitem><para>Immediately jump to | |
187 | the end of the journal inside the | |
fe59e38b LP |
188 | implied pager tool. This implies |
189 | <option>-n1000</option> to guarantee | |
409dee2e | 190 | that the pager will not buffer logs of |
7d7681f7 | 191 | unbounded size. This may be overridden |
fe59e38b LP |
192 | with an explicit <option>-n</option> |
193 | with some other numeric value on the | |
194 | command line. Note that this option is | |
195 | only supported for the | |
1b12a7b5 HH |
196 | <citerefentry><refentrytitle>less</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
197 | pager.</para></listitem> | |
198 | </varlistentry> | |
199 | ||
2af777ba | 200 | <varlistentry> |
2af777ba | 201 | <term><option>-n</option></term> |
a7f5bb1e | 202 | <term><option>--lines=</option></term> |
2af777ba | 203 | |
2eb8e90f ZJS |
204 | <listitem><para>Show the most recent |
205 | journal events and limit the number of | |
206 | events shown. If | |
207 | <option>--follow</option> is used, | |
208 | this option is implied. The argument, | |
209 | a positive integer, is optional, and | |
210 | defaults to 10. </para></listitem> | |
2af777ba LP |
211 | </varlistentry> |
212 | ||
213 | <varlistentry> | |
214 | <term><option>--no-tail</option></term> | |
215 | ||
216 | <listitem><para>Show all stored output | |
217 | lines, even in follow mode. Undoes the | |
218 | effect of | |
219 | <option>--lines=</option>.</para></listitem> | |
220 | </varlistentry> | |
221 | ||
d89d6c86 LN |
222 | <varlistentry> |
223 | <term><option>-r</option></term> | |
224 | <term><option>--reverse</option></term> | |
225 | ||
226 | <listitem><para>Reverse output, so the newest | |
227 | entries are displayed first.</para></listitem> | |
228 | </varlistentry> | |
229 | ||
2af777ba | 230 | <varlistentry> |
2af777ba | 231 | <term><option>-o</option></term> |
a7f5bb1e | 232 | <term><option>--output=</option></term> |
2af777ba LP |
233 | |
234 | <listitem><para>Controls the | |
f8813ec7 LP |
235 | formatting of the journal entries that |
236 | are shown. Takes one of | |
2af777ba LP |
237 | <literal>short</literal>, |
238 | <literal>short-monotonic</literal>, | |
239 | <literal>verbose</literal>, | |
240 | <literal>export</literal>, | |
241 | <literal>json</literal>, | |
a6e87e90 | 242 | <literal>json-pretty</literal>, |
48383c25 | 243 | <literal>json-sse</literal>, |
2af777ba LP |
244 | <literal>cat</literal>. <literal>short</literal> |
245 | is the default and generates an output | |
246 | that is mostly identical to the | |
409dee2e | 247 | formatting of classic syslog |
2af777ba LP |
248 | files, showing one line per journal |
249 | entry. <literal>short-monotonic</literal> | |
250 | is very similar but shows monotonic | |
251 | timestamps instead of wallclock | |
252 | timestamps. <literal>verbose</literal> | |
49f43d5f | 253 | shows the full structured entry items |
2af777ba | 254 | with all |
49f43d5f | 255 | fields. <literal>export</literal> |
2af777ba LP |
256 | serializes the journal into a binary |
257 | (but mostly text-based) stream | |
258 | suitable for backups and network | |
f8813ec7 LP |
259 | transfer (see <ulink |
260 | url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal | |
261 | Export Format</ulink> for more | |
262 | information). <literal>json</literal> | |
2af777ba | 263 | formats entries as JSON data |
a6e87e90 | 264 | structures, one per |
d99ae53a LP |
265 | line (see <ulink |
266 | url="http://www.freedesktop.org/wiki/Software/systemd/json">Journal | |
267 | JSON Format</ulink> for more | |
268 | information). <literal>json-pretty</literal> | |
a6e87e90 LP |
269 | also formats entries as JSON data |
270 | structures, but formats them in | |
271 | multiple lines in order to make them | |
272 | more readable for | |
48383c25 LP |
273 | humans. <literal>json-sse</literal> |
274 | also formats entries as JSON data | |
275 | structures, but wraps them in a format | |
276 | suitable for <ulink | |
277 | url="https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sent_events">Server-Sent | |
278 | Events</ulink>. <literal>cat</literal> | |
2af777ba LP |
279 | generates a very terse output only |
280 | showing the actual message of each | |
281 | journal entry with no meta data, not | |
282 | even a timestamp.</para></listitem> | |
283 | </varlistentry> | |
284 | ||
d4205751 | 285 | <varlistentry> |
d4205751 | 286 | <term><option>-x</option></term> |
a7f5bb1e | 287 | <term><option>--catalog</option></term> |
d4205751 LP |
288 | |
289 | <listitem><para>Augment log lines with | |
290 | explanation texts from the message | |
291 | catalog. This will add explanatory | |
292 | help texts to log messages in the | |
293 | output where this is available. These | |
294 | short help texts will explain the | |
295 | context of an error or log event, | |
296 | possible solutions, as well as | |
297 | pointers to support forums, developer | |
298 | documentation and any other relevant | |
299 | manuals. Note that help texts are not | |
2d27a19d LP |
300 | available for all messages, but only |
301 | for selected ones. For more | |
409dee2e | 302 | information on the message catalog, |
2d27a19d LP |
303 | please refer to the <ulink |
304 | url="http://www.freedesktop.org/wiki/Software/systemd/catalog">Message | |
305 | Catalog Developer | |
306 | Documentation</ulink>.</para></listitem> | |
d4205751 LP |
307 | </varlistentry> |
308 | ||
2af777ba | 309 | <varlistentry> |
2af777ba | 310 | <term><option>-q</option></term> |
a7f5bb1e | 311 | <term><option>--quiet</option></term> |
2af777ba LP |
312 | |
313 | <listitem><para>Suppresses any warning | |
49f43d5f | 314 | message regarding inaccessible system |
2af777ba LP |
315 | journals when run as normal |
316 | user.</para></listitem> | |
317 | </varlistentry> | |
318 | ||
2bd3c38a | 319 | <varlistentry> |
9e8a535f | 320 | <term><option>-m</option></term> |
a7f5bb1e | 321 | <term><option>--merge</option></term> |
2bd3c38a | 322 | |
9e8a535f LP |
323 | <listitem><para>Show entries |
324 | interleaved from all available | |
325 | journals, including remote | |
326 | ones.</para></listitem> | |
2bd3c38a LP |
327 | </varlistentry> |
328 | ||
59cea26a | 329 | <varlistentry> |
59cea26a | 330 | <term><option>-b</option></term> |
a7f5bb1e | 331 | <term><option>--this-boot</option></term> |
59cea26a LP |
332 | |
333 | <listitem><para>Show data only from | |
c3f60ec5 LP |
334 | current boot. This will add a match |
335 | for <literal>_BOOT_ID=</literal> for | |
336 | the current boot ID of the | |
337 | kernel.</para></listitem> | |
338 | </varlistentry> | |
339 | ||
2927b326 JJ |
340 | <varlistentry> |
341 | <term><option>-k</option></term> | |
342 | <term><option>--dmesg</option></term> | |
343 | ||
344 | <listitem><para>Show kernel messages from | |
345 | current boot. This implies <option>-b</option> | |
346 | and adds the match <literal>_TRANSPORT=kernel</literal>. | |
347 | </para></listitem> | |
348 | </varlistentry> | |
349 | ||
c3f60ec5 | 350 | <varlistentry> |
c3f60ec5 | 351 | <term><option>-u</option></term> |
a7f5bb1e | 352 | <term><option>--unit=</option></term> |
c3f60ec5 | 353 | |
7199aa96 ZJS |
354 | <listitem><para>Show messages for the |
355 | specified systemd unit. This will add | |
356 | a match for messages from the unit | |
357 | (<literal>_SYSTEMD_UNIT=</literal>) | |
358 | and additional matches for messages | |
359 | from systemd and messages about | |
b9e40524 HH |
360 | coredumps for the specified unit.</para> |
361 | <para>This parameter can be specified multiple times. | |
7199aa96 | 362 | </para></listitem> |
ffa7cd15 DW |
363 | </varlistentry> |
364 | ||
365 | <varlistentry> | |
366 | <term><option>--user-unit=</option></term> | |
367 | ||
7199aa96 | 368 | <listitem><para>Show messages for the |
ffa7cd15 | 369 | specified user session unit. This will |
7199aa96 ZJS |
370 | add a match for messages from the unit |
371 | (<literal>_SYSTEMD_USER_UNIT=</literal> | |
372 | and <literal>_UID=</literal>) and | |
373 | additional matches for messages from | |
374 | session systemd and messages about | |
b9e40524 HH |
375 | coredumps for the specified unit.</para> |
376 | <para>This parameter can be specified multiple times. | |
7199aa96 | 377 | </para></listitem> |
c3f60ec5 LP |
378 | </varlistentry> |
379 | ||
380 | <varlistentry> | |
381 | <term><option>-p</option></term> | |
382 | <term><option>--priority=</option></term> | |
383 | ||
384 | <listitem><para>Filter output by | |
385 | message priorities or priority | |
386 | ranges. Takes either a single numeric | |
387 | or textual log level (i.e. between | |
388 | 0/<literal>emerg</literal> and | |
389 | 7/<literal>debug</literal>), or a | |
390 | range of numeric/text log levels in | |
391 | the form FROM..TO. The log levels are | |
392 | the usual syslog log levels as | |
393 | documented in | |
394 | <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
395 | i.e. <literal>emerg</literal> (0), | |
396 | <literal>alert</literal> (1), | |
397 | <literal>crit</literal> (2), | |
398 | <literal>err</literal> (3), | |
399 | <literal>warning</literal> (4), | |
400 | <literal>notice</literal> (5), | |
401 | <literal>info</literal> (6), | |
402 | <literal>debug</literal> (7). If a | |
409dee2e | 403 | single log level is specified, all |
c3f60ec5 LP |
404 | messages with this log level or a |
405 | lower (hence more important) log level | |
409dee2e | 406 | are shown. If a range is specified, all |
c3f60ec5 LP |
407 | messages within the range are shown, |
408 | including both the start and the end | |
409 | value of the range. This will add | |
410 | <literal>PRIORITY=</literal> matches | |
411 | for the specified | |
412 | priorities.</para></listitem> | |
59cea26a LP |
413 | </varlistentry> |
414 | ||
8f14c832 | 415 | <varlistentry> |
8f14c832 | 416 | <term><option>-c</option></term> |
a7f5bb1e | 417 | <term><option>--cursor=</option></term> |
8f14c832 | 418 | |
cfbc22ab LP |
419 | <listitem><para>Start showing entries |
420 | from the location in the journal | |
421 | specified by the passed | |
8f14c832 LP |
422 | cursor.</para></listitem> |
423 | </varlistentry> | |
424 | ||
cfbc22ab LP |
425 | <varlistentry> |
426 | <term><option>--since=</option></term> | |
427 | <term><option>--until=</option></term> | |
428 | ||
429 | <listitem><para>Start showing entries | |
16dad32e AE |
430 | on or newer than the specified date, |
431 | or on or older than the specified | |
909f413d ZJS |
432 | date, respectively. Date specifications |
433 | should be of the format | |
434 | <literal>2012-10-30 18:17:16</literal>. | |
435 | If the time part is omitted, | |
436 | <literal>00:00:00</literal> is assumed. | |
437 | If only the seconds component is omitted, | |
438 | <literal>:00</literal> is assumed. If the | |
439 | date component is omitted, the current | |
440 | day is assumed. Alternatively the strings | |
cfbc22ab LP |
441 | <literal>yesterday</literal>, |
442 | <literal>today</literal>, | |
443 | <literal>tomorrow</literal> are | |
444 | understood, which refer to 00:00:00 of | |
445 | the day before the current day, the | |
16dad32e AE |
446 | current day, or the day after the |
447 | current day, respectively. <literal>now</literal> | |
cfbc22ab LP |
448 | refers to the current time. Finally, |
449 | relative times may be specified, | |
450 | prefixed with <literal>-</literal> or | |
451 | <literal>+</literal>, referring to | |
16dad32e AE |
452 | times before or after the current |
453 | time, respectively.</para></listitem> | |
cfbc22ab LP |
454 | </varlistentry> |
455 | ||
15119c16 | 456 | <varlistentry> |
9536e0e1 | 457 | <term><option>-F</option></term> |
a7f5bb1e | 458 | <term><option>--field=</option></term> |
15119c16 LP |
459 | |
460 | <listitem><para>Print all possible | |
461 | data values the specified field can | |
462 | take in all entries of the | |
463 | journal.</para></listitem> | |
464 | </varlistentry> | |
465 | ||
3f3a438f ZJS |
466 | <varlistentry> |
467 | <term><option>--system</option></term> | |
468 | <term><option>--user</option></term> | |
469 | ||
470 | <listitem><para>Show messages from | |
471 | system services and the kernel (with | |
472 | <option>--system</option>). Show | |
473 | messages from service of current user | |
474 | (with <option>--user</option>). | |
475 | If neither is specified, show all | |
476 | messages that the user can see. | |
477 | </para></listitem> | |
478 | </varlistentry> | |
479 | ||
a963990f | 480 | <varlistentry> |
8d98da3f ZJS |
481 | <term><option>-D <replaceable>DIR</replaceable></option></term> |
482 | <term><option>--directory=<replaceable>DIR</replaceable></option></term> | |
483 | ||
484 | <listitem><para>Takes a directory path | |
409dee2e | 485 | as argument. If specified, journalctl |
8d98da3f ZJS |
486 | will operate on the specified journal |
487 | directory | |
488 | <replaceable>DIR</replaceable> instead | |
489 | of the default runtime and system | |
490 | journal paths.</para></listitem> | |
491 | </varlistentry> | |
492 | ||
493 | <varlistentry> | |
494 | <term><option>--file=<replaceable>GLOB</replaceable></option></term> | |
495 | ||
496 | <listitem><para>Takes a file glob as | |
409dee2e | 497 | argument. If specified, journalctl will |
8d98da3f ZJS |
498 | operate on the specified journal files |
499 | matching <replaceable>GLOB</replaceable> | |
500 | instead of the default runtime and | |
501 | system journal paths. May be specified | |
502 | multiple times, in which case files will | |
503 | be suitably interleaved.</para></listitem> | |
a963990f LP |
504 | </varlistentry> |
505 | ||
13cbf3a5 ZJS |
506 | <varlistentry> |
507 | <term><option>--root=<replaceable>ROOT</replaceable></option></term> | |
508 | ||
509 | <listitem><para>Takes a directory path | |
409dee2e | 510 | as argument. If specified, journalctl |
13cbf3a5 ZJS |
511 | will operate on catalog file hierarchy |
512 | underneath the specified directory | |
513 | instead of the root directory | |
514 | (e.g. <option>--update-catalog</option> | |
515 | will create | |
516 | <filename><replaceable>ROOT</replaceable>/var/lib/systemd/catalog/database</filename>). | |
517 | </para></listitem> | |
518 | </varlistentry> | |
519 | ||
31094aae LP |
520 | <varlistentry> |
521 | <term><option>--new-id128</option></term> | |
522 | ||
523 | <listitem><para>Instead of showing | |
409dee2e | 524 | journal contents, generate a new 128 |
31094aae LP |
525 | bit ID suitable for identifying |
526 | messages. This is intended for usage | |
527 | by developers who need a new | |
528 | identifier for a new message they | |
529 | introduce and want to make | |
409dee2e | 530 | recognizable. This will print the new ID in |
31094aae LP |
531 | three different formats which can be |
532 | copied into source code or | |
533 | similar.</para></listitem> | |
534 | </varlistentry> | |
535 | ||
536 | <varlistentry> | |
537 | <term><option>--header</option></term> | |
538 | ||
539 | <listitem><para>Instead of showing | |
409dee2e | 540 | journal contents, show internal header |
a0b78ede | 541 | information of the journal fields |
31094aae | 542 | accessed.</para></listitem> |
a1a03e30 LP |
543 | </varlistentry> |
544 | ||
545 | <varlistentry> | |
546 | <term><option>--disk-usage</option></term> | |
547 | ||
548 | <listitem><para>Shows the current disk | |
549 | usage of all | |
550 | journal files.</para></listitem> | |
d4205751 LP |
551 | </varlistentry> |
552 | ||
553 | <varlistentry> | |
54b7254c ZJS |
554 | <term><option>--list-catalog |
555 | <optional><replaceable>ID128...</replaceable></optional> | |
556 | </option></term> | |
d4205751 LP |
557 | |
558 | <listitem><para>List the contents of | |
559 | the message catalog, as table of | |
560 | message IDs plus their short | |
54b7254c ZJS |
561 | description strings.</para> |
562 | ||
563 | <para>If any | |
564 | <replaceable>ID128</replaceable>s are | |
565 | specified, only those entries are shown. | |
566 | </para> | |
567 | </listitem> | |
568 | </varlistentry> | |
569 | ||
570 | <varlistentry> | |
571 | <term><option>--dump-catalog | |
572 | <optional><replaceable>ID128...</replaceable></optional> | |
573 | </option></term> | |
574 | ||
575 | <listitem><para>Show the contents of | |
576 | the message catalog, with entries | |
577 | separated by a line consisting of two | |
578 | dashes and the id (the format is the | |
579 | same as <filename>.catalog</filename> | |
580 | files.</para> | |
581 | ||
582 | <para>If any | |
583 | <replaceable>ID128</replaceable>s are | |
584 | specified, only those entries are shown. | |
585 | </para> | |
586 | </listitem> | |
d4205751 LP |
587 | </varlistentry> |
588 | ||
589 | <varlistentry> | |
590 | <term><option>--update-catalog</option></term> | |
591 | ||
592 | <listitem><para>Update the message | |
593 | catalog index. This command needs to | |
594 | be executed each time new catalog | |
595 | files are installed, removed or | |
596 | updated to rebuild the binary catalog | |
597 | index.</para></listitem> | |
31094aae LP |
598 | </varlistentry> |
599 | ||
600 | <varlistentry> | |
601 | <term><option>--setup-keys</option></term> | |
602 | ||
603 | <listitem><para>Instead of showing | |
409dee2e | 604 | journal contents, generate a new key |
31094aae LP |
605 | pair for Forward Secure Sealing |
606 | (FSS). This will generate a sealing | |
607 | key and a verification key. The | |
608 | sealing key is stored in the journal | |
609 | data directory and shall remain on the | |
610 | host. The verification key should be | |
fe004b7c LP |
611 | stored externally. Also see the |
612 | <option>Seal=</option> option in | |
613 | <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
614 | for details.</para></listitem> | |
31094aae LP |
615 | </varlistentry> |
616 | ||
b8547c10 SL |
617 | <varlistentry> |
618 | <term><option>--force</option></term> | |
619 | ||
620 | <listitem><para>When --setup-keys is passed and | |
621 | Forward Secure Sealing has already been set up, | |
622 | recreate FSS keys.</para></listitem> | |
623 | </varlistentry> | |
624 | ||
31094aae LP |
625 | <varlistentry> |
626 | <term><option>--interval=</option></term> | |
627 | ||
628 | <listitem><para>Specifies the change | |
409dee2e | 629 | interval for the sealing key when |
31094aae LP |
630 | generating an FSS key pair with |
631 | <option>--setup-keys</option>. Shorter | |
632 | intervals increase CPU consumption but | |
633 | shorten the time range of | |
634 | undetectable journal | |
635 | alterations. Defaults to | |
636 | 15min.</para></listitem> | |
637 | </varlistentry> | |
638 | ||
639 | <varlistentry> | |
640 | <term><option>--verify</option></term> | |
641 | ||
642 | <listitem><para>Check the journal file | |
643 | for internal consistency. If the | |
644 | file has been generated with FSS | |
409dee2e | 645 | enabled and the FSS verification key |
31094aae | 646 | has been specified with |
409dee2e | 647 | <option>--verify-key=</option>, |
31094aae LP |
648 | authenticity of the journal file is |
649 | verified.</para></listitem> | |
650 | </varlistentry> | |
651 | ||
652 | <varlistentry> | |
653 | <term><option>--verify-key=</option></term> | |
654 | ||
655 | <listitem><para>Specifies the FSS | |
656 | verification key to use for the | |
657 | <option>--verify</option> | |
658 | operation.</para></listitem> | |
659 | </varlistentry> | |
660 | ||
2af777ba LP |
661 | </variablelist> |
662 | </refsect1> | |
663 | ||
664 | <refsect1> | |
665 | <title>Exit status</title> | |
666 | ||
409dee2e | 667 | <para>On success, 0 is returned, a non-zero failure |
2af777ba LP |
668 | code otherwise.</para> |
669 | </refsect1> | |
670 | ||
671 | <refsect1> | |
672 | <title>Environment</title> | |
673 | ||
ccc9a4f9 | 674 | <variablelist class='environment-variables'> |
2af777ba LP |
675 | <varlistentry> |
676 | <term><varname>$SYSTEMD_PAGER</varname></term> | |
677 | <listitem><para>Pager to use when | |
678 | <option>--no-pager</option> is not given; | |
679 | overrides <varname>$PAGER</varname>. Setting | |
680 | this to an empty string or the value | |
681 | <literal>cat</literal> is equivalent to passing | |
682 | <option>--no-pager</option>.</para></listitem> | |
683 | </varlistentry> | |
684 | </variablelist> | |
685 | </refsect1> | |
686 | ||
cbdca852 LP |
687 | <refsect1> |
688 | <title>Examples</title> | |
689 | ||
409dee2e | 690 | <para>Without arguments, all collected logs are shown |
cbdca852 LP |
691 | unfiltered:</para> |
692 | ||
693 | <programlisting>journalctl</programlisting> | |
694 | ||
409dee2e | 695 | <para>With one match specified, all entries with a field matching the expression are shown:</para> |
cbdca852 LP |
696 | |
697 | <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service</programlisting> | |
698 | ||
409dee2e | 699 | <para>If two different fields are matched, only entries matching both expressions at the same time are shown:</para> |
cbdca852 LP |
700 | |
701 | <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097</programlisting> | |
702 | ||
409dee2e | 703 | <para>If two matches refer to the same field, all entries matching either expression are shown:</para> |
cbdca852 LP |
704 | |
705 | <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _SYSTEMD_UNIT=dbus.service</programlisting> | |
706 | ||
409dee2e | 707 | <para>If the separator <literal>+</literal> is used, |
a0b78ede | 708 | two expressions may be combined in a logical OR. The |
cbdca852 LP |
709 | following will show all messages from the Avahi |
710 | service process with the PID 28097 plus all messages | |
711 | from the D-Bus service (from any of its | |
712 | processes):</para> | |
713 | ||
714 | <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097 + _SYSTEMD_UNIT=dbus.service</programlisting> | |
715 | ||
b6a34514 LP |
716 | <para>Show all logs generated by the D-Bus executable:</para> |
717 | ||
718 | <programlisting>journalctl /usr/bin/dbus-daemon</programlisting> | |
719 | ||
845c5324 | 720 | <para>Show all logs of the kernel device node <filename noindex='true'>/dev/sda</filename>:</para> |
b6a34514 LP |
721 | |
722 | <programlisting>journalctl /dev/sda</programlisting> | |
723 | ||
cbdca852 LP |
724 | </refsect1> |
725 | ||
2af777ba LP |
726 | <refsect1> |
727 | <title>See Also</title> | |
728 | <para> | |
729 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
01cf0ca8 | 730 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
2af777ba | 731 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
ffa16db0 | 732 | <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
18b754d3 | 733 | <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
2af777ba LP |
734 | </para> |
735 | </refsect1> | |
736 | ||
737 | </refentry> |