projects / thirdparty / systemd.git / blame
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| 2af777ba LP |
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 | |
| a0b78ede | 67 | <para>If called without parameter it will show the full |
| 2af777ba LP |
68 | contents of the journal, starting with the oldest |
| 69 | entry collected.</para> | |
| 70 | ||
| cbdca852 LP |
71 | <para>If one or more match arguments are passed the |
| 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 LP |
78 | for a list of well-known fields. If multiple matches |
| 79 | are specified matching different fields the log | |
| 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 | |
| 87 | "<literal>+</literal>" appears as separate word on the | |
| 88 | command line all matches before and after are combined | |
| 89 | in a disjunction (i.e. logical OR).</para> | |
| 2af777ba | 90 | |
| b6a34514 LP |
91 | <para>As shortcuts for a few types of field/value |
| 92 | matches file paths may be specified. If a file path | |
| 93 | refers to an executable file, this is equivalent to an | |
| 94 | <literal>_EXE=</literal> match for the canonicalized | |
| 95 | binary path. Similar, if a path refers to a device | |
| 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 | |
| 102 | being written, and regardless whether they belong to the | |
| 103 | system itself or are accessible user journals.</para> | |
| 104 | ||
| 105 | <para>All users are granted access to their private | |
| 106 | per-user journals. However, by default only root and | |
| 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> | |
| 110 | </refsect1> | |
| 111 | ||
| 112 | <refsect1> | |
| 113 | <title>Options</title> | |
| 114 | ||
| 115 | <para>The following options are understood:</para> | |
| 116 | ||
| 117 | <variablelist> | |
| 118 | <varlistentry> | |
| 2af777ba | 119 | <term><option>-h</option></term> |
| a7f5bb1e | 120 | <term><option>--help</option></term> |
| 2af777ba LP |
121 | |
| 122 | <listitem><para>Prints a short help | |
| 123 | text and exits.</para></listitem> | |
| 124 | </varlistentry> | |
| 125 | ||
| 126 | <varlistentry> | |
| 127 | <term><option>--version</option></term> | |
| 128 | ||
| 129 | <listitem><para>Prints a short version | |
| 130 | string and exits.</para></listitem> | |
| 131 | </varlistentry> | |
| 132 | ||
| 133 | <varlistentry> | |
| 134 | <term><option>--no-pager</option></term> | |
| 135 | ||
| 0e25e94e KS |
136 | <listitem><para>Do not pipe output into a |
| 137 | pager.</para></listitem> | |
| 138 | </varlistentry> | |
| 2af777ba | 139 | |
| e3657ecd | 140 | <varlistentry> |
| 98a6e132 | 141 | <term><option>-l</option></term> |
| e3657ecd ZJS |
142 | <term><option>--full</option></term> |
| 143 | ||
| 144 | <listitem><para>Show all (printable) fields in | |
| 145 | full.</para></listitem> | |
| 146 | </varlistentry> | |
| 147 | ||
| 2af777ba | 148 | <varlistentry> |
| 2af777ba | 149 | <term><option>-a</option></term> |
| a7f5bb1e | 150 | <term><option>--all</option></term> |
| 2af777ba LP |
151 | |
| 152 | <listitem><para>Show all fields in | |
| 153 | full, even if they include unprintable | |
| 154 | characters or are very | |
| 155 | long.</para></listitem> | |
| 156 | </varlistentry> | |
| 157 | ||
| 158 | <varlistentry> | |
| 2af777ba | 159 | <term><option>-f</option></term> |
| a7f5bb1e | 160 | <term><option>--follow</option></term> |
| 2af777ba | 161 | |
| a0b78ede | 162 | <listitem><para>Show only the most recent |
| 49f43d5f | 163 | journal entries, and continuously print |
| 5c3246b1 LP |
164 | new entries as they are appended to |
| 165 | the journal.</para></listitem> | |
| 2af777ba LP |
166 | </varlistentry> |
| 167 | ||
| 1b12a7b5 HH |
168 | <varlistentry> |
| 169 | <term><option>-e</option></term> | |
| 170 | <term><option>--pager-end</option></term> | |
| 171 | ||
| 172 | <listitem><para>Immediately jump to | |
| 173 | the end of the journal inside the | |
| fe59e38b LP |
174 | implied pager tool. This implies |
| 175 | <option>-n1000</option> to guarantee | |
| 176 | that the pager won't buffer logs of | |
| 7d7681f7 | 177 | unbounded size. This may be overridden |
| fe59e38b LP |
178 | with an explicit <option>-n</option> |
| 179 | with some other numeric value on the | |
| 180 | command line. Note that this option is | |
| 181 | only supported for the | |
| 1b12a7b5 HH |
182 | <citerefentry><refentrytitle>less</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
| 183 | pager.</para></listitem> | |
| 184 | </varlistentry> | |
| 185 | ||
| 2af777ba | 186 | <varlistentry> |
| 2af777ba | 187 | <term><option>-n</option></term> |
| a7f5bb1e | 188 | <term><option>--lines=</option></term> |
| 2af777ba | 189 | |
| 2eb8e90f ZJS |
190 | <listitem><para>Show the most recent |
| 191 | journal events and limit the number of | |
| 192 | events shown. If | |
| 193 | <option>--follow</option> is used, | |
| 194 | this option is implied. The argument, | |
| 195 | a positive integer, is optional, and | |
| 196 | defaults to 10. </para></listitem> | |
| 2af777ba LP |
197 | </varlistentry> |
| 198 | ||
| 199 | <varlistentry> | |
| 200 | <term><option>--no-tail</option></term> | |
| 201 | ||
| 202 | <listitem><para>Show all stored output | |
| 203 | lines, even in follow mode. Undoes the | |
| 204 | effect of | |
| 205 | <option>--lines=</option>.</para></listitem> | |
| 206 | </varlistentry> | |
| 207 | ||
| d89d6c86 LN |
208 | <varlistentry> |
| 209 | <term><option>-r</option></term> | |
| 210 | <term><option>--reverse</option></term> | |
| 211 | ||
| 212 | <listitem><para>Reverse output, so the newest | |
| 213 | entries are displayed first.</para></listitem> | |
| 214 | </varlistentry> | |
| 215 | ||
| 2af777ba | 216 | <varlistentry> |
| 2af777ba | 217 | <term><option>-o</option></term> |
| a7f5bb1e | 218 | <term><option>--output=</option></term> |
| 2af777ba LP |
219 | |
| 220 | <listitem><para>Controls the | |
| f8813ec7 LP |
221 | formatting of the journal entries that |
| 222 | are shown. Takes one of | |
| 2af777ba LP |
223 | <literal>short</literal>, |
| 224 | <literal>short-monotonic</literal>, | |
| 225 | <literal>verbose</literal>, | |
| 226 | <literal>export</literal>, | |
| 227 | <literal>json</literal>, | |
| a6e87e90 | 228 | <literal>json-pretty</literal>, |
| 48383c25 | 229 | <literal>json-sse</literal>, |
| 2af777ba LP |
230 | <literal>cat</literal>. <literal>short</literal> |
| 231 | is the default and generates an output | |
| 232 | that is mostly identical to the | |
| 233 | formatting of classic syslog log | |
| 234 | files, showing one line per journal | |
| 235 | entry. <literal>short-monotonic</literal> | |
| 236 | is very similar but shows monotonic | |
| 237 | timestamps instead of wallclock | |
| 238 | timestamps. <literal>verbose</literal> | |
| 49f43d5f | 239 | shows the full structured entry items |
| 2af777ba | 240 | with all |
| 49f43d5f | 241 | fields. <literal>export</literal> |
| 2af777ba LP |
242 | serializes the journal into a binary |
| 243 | (but mostly text-based) stream | |
| 244 | suitable for backups and network | |
| f8813ec7 LP |
245 | transfer (see <ulink |
| 246 | url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal | |
| 247 | Export Format</ulink> for more | |
| 248 | information). <literal>json</literal> | |
| 2af777ba | 249 | formats entries as JSON data |
| a6e87e90 | 250 | structures, one per |
| d99ae53a LP |
251 | line (see <ulink |
| 252 | url="http://www.freedesktop.org/wiki/Software/systemd/json">Journal | |
| 253 | JSON Format</ulink> for more | |
| 254 | information). <literal>json-pretty</literal> | |
| a6e87e90 LP |
255 | also formats entries as JSON data |
| 256 | structures, but formats them in | |
| 257 | multiple lines in order to make them | |
| 258 | more readable for | |
| 48383c25 LP |
259 | humans. <literal>json-sse</literal> |
| 260 | also formats entries as JSON data | |
| 261 | structures, but wraps them in a format | |
| 262 | suitable for <ulink | |
| 263 | url="https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sent_events">Server-Sent | |
| 264 | Events</ulink>. <literal>cat</literal> | |
| 2af777ba LP |
265 | generates a very terse output only |
| 266 | showing the actual message of each | |
| 267 | journal entry with no meta data, not | |
| 268 | even a timestamp.</para></listitem> | |
| 269 | </varlistentry> | |
| 270 | ||
| d4205751 | 271 | <varlistentry> |
| d4205751 | 272 | <term><option>-x</option></term> |
| a7f5bb1e | 273 | <term><option>--catalog</option></term> |
| d4205751 LP |
274 | |
| 275 | <listitem><para>Augment log lines with | |
| 276 | explanation texts from the message | |
| 277 | catalog. This will add explanatory | |
| 278 | help texts to log messages in the | |
| 279 | output where this is available. These | |
| 280 | short help texts will explain the | |
| 281 | context of an error or log event, | |
| 282 | possible solutions, as well as | |
| 283 | pointers to support forums, developer | |
| 284 | documentation and any other relevant | |
| 285 | manuals. Note that help texts are not | |
| 2d27a19d LP |
286 | available for all messages, but only |
| 287 | for selected ones. For more | |
| 288 | information on the message catalog | |
| 289 | please refer to the <ulink | |
| 290 | url="http://www.freedesktop.org/wiki/Software/systemd/catalog">Message | |
| 291 | Catalog Developer | |
| 292 | Documentation</ulink>.</para></listitem> | |
| d4205751 LP |
293 | </varlistentry> |
| 294 | ||
| 2af777ba | 295 | <varlistentry> |
| 2af777ba | 296 | <term><option>-q</option></term> |
| a7f5bb1e | 297 | <term><option>--quiet</option></term> |
| 2af777ba LP |
298 | |
| 299 | <listitem><para>Suppresses any warning | |
| 49f43d5f | 300 | message regarding inaccessible system |
| 2af777ba LP |
301 | journals when run as normal |
| 302 | user.</para></listitem> | |
| 303 | </varlistentry> | |
| 304 | ||
| 2bd3c38a | 305 | <varlistentry> |
| 9e8a535f | 306 | <term><option>-m</option></term> |
| a7f5bb1e | 307 | <term><option>--merge</option></term> |
| 2bd3c38a | 308 | |
| 9e8a535f LP |
309 | <listitem><para>Show entries |
| 310 | interleaved from all available | |
| 311 | journals, including remote | |
| 312 | ones.</para></listitem> | |
| 2bd3c38a LP |
313 | </varlistentry> |
| 314 | ||
| 59cea26a | 315 | <varlistentry> |
| 59cea26a | 316 | <term><option>-b</option></term> |
| a7f5bb1e | 317 | <term><option>--this-boot</option></term> |
| 59cea26a LP |
318 | |
| 319 | <listitem><para>Show data only from | |
| c3f60ec5 LP |
320 | current boot. This will add a match |
| 321 | for <literal>_BOOT_ID=</literal> for | |
| 322 | the current boot ID of the | |
| 323 | kernel.</para></listitem> | |
| 324 | </varlistentry> | |
| 325 | ||
| 2927b326 JJ |
326 | <varlistentry> |
| 327 | <term><option>-k</option></term> | |
| 328 | <term><option>--dmesg</option></term> | |
| 329 | ||
| 330 | <listitem><para>Show kernel messages from | |
| 331 | current boot. This implies <option>-b</option> | |
| 332 | and adds the match <literal>_TRANSPORT=kernel</literal>. | |
| 333 | </para></listitem> | |
| 334 | </varlistentry> | |
| 335 | ||
| c3f60ec5 | 336 | <varlistentry> |
| c3f60ec5 | 337 | <term><option>-u</option></term> |
| a7f5bb1e | 338 | <term><option>--unit=</option></term> |
| c3f60ec5 | 339 | |
| 7199aa96 ZJS |
340 | <listitem><para>Show messages for the |
| 341 | specified systemd unit. This will add | |
| 342 | a match for messages from the unit | |
| 343 | (<literal>_SYSTEMD_UNIT=</literal>) | |
| 344 | and additional matches for messages | |
| 345 | from systemd and messages about | |
| b9e40524 HH |
346 | coredumps for the specified unit.</para> |
| 347 | <para>This parameter can be specified multiple times. | |
| 7199aa96 | 348 | </para></listitem> |
| ffa7cd15 DW |
349 | </varlistentry> |
| 350 | ||
| 351 | <varlistentry> | |
| 352 | <term><option>--user-unit=</option></term> | |
| 353 | ||
| 7199aa96 | 354 | <listitem><para>Show messages for the |
| ffa7cd15 | 355 | specified user session unit. This will |
| 7199aa96 ZJS |
356 | add a match for messages from the unit |
| 357 | (<literal>_SYSTEMD_USER_UNIT=</literal> | |
| 358 | and <literal>_UID=</literal>) and | |
| 359 | additional matches for messages from | |
| 360 | session systemd and messages about | |
| b9e40524 HH |
361 | coredumps for the specified unit.</para> |
| 362 | <para>This parameter can be specified multiple times. | |
| 7199aa96 | 363 | </para></listitem> |
| c3f60ec5 LP |
364 | </varlistentry> |
| 365 | ||
| 366 | <varlistentry> | |
| 367 | <term><option>-p</option></term> | |
| 368 | <term><option>--priority=</option></term> | |
| 369 | ||
| 370 | <listitem><para>Filter output by | |
| 371 | message priorities or priority | |
| 372 | ranges. Takes either a single numeric | |
| 373 | or textual log level (i.e. between | |
| 374 | 0/<literal>emerg</literal> and | |
| 375 | 7/<literal>debug</literal>), or a | |
| 376 | range of numeric/text log levels in | |
| 377 | the form FROM..TO. The log levels are | |
| 378 | the usual syslog log levels as | |
| 379 | documented in | |
| 380 | <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
| 381 | i.e. <literal>emerg</literal> (0), | |
| 382 | <literal>alert</literal> (1), | |
| 383 | <literal>crit</literal> (2), | |
| 384 | <literal>err</literal> (3), | |
| 385 | <literal>warning</literal> (4), | |
| 386 | <literal>notice</literal> (5), | |
| 387 | <literal>info</literal> (6), | |
| 388 | <literal>debug</literal> (7). If a | |
| 389 | single log level is specified all | |
| 390 | messages with this log level or a | |
| 391 | lower (hence more important) log level | |
| 392 | are shown. If a range is specified all | |
| 393 | messages within the range are shown, | |
| 394 | including both the start and the end | |
| 395 | value of the range. This will add | |
| 396 | <literal>PRIORITY=</literal> matches | |
| 397 | for the specified | |
| 398 | priorities.</para></listitem> | |
| 59cea26a LP |
399 | </varlistentry> |
| 400 | ||
| 8f14c832 | 401 | <varlistentry> |
| 8f14c832 | 402 | <term><option>-c</option></term> |
| a7f5bb1e | 403 | <term><option>--cursor=</option></term> |
| 8f14c832 | 404 | |
| cfbc22ab LP |
405 | <listitem><para>Start showing entries |
| 406 | from the location in the journal | |
| 407 | specified by the passed | |
| 8f14c832 LP |
408 | cursor.</para></listitem> |
| 409 | </varlistentry> | |
| 410 | ||
| cfbc22ab LP |
411 | <varlistentry> |
| 412 | <term><option>--since=</option></term> | |
| 413 | <term><option>--until=</option></term> | |
| 414 | ||
| 415 | <listitem><para>Start showing entries | |
| 16dad32e AE |
416 | on or newer than the specified date, |
| 417 | or on or older than the specified | |
| 418 | date, respectively. Date specifications should be of | |
| cfbc22ab LP |
419 | the format "2012-10-30 18:17:16". If |
| 420 | the time part is omitted, 00:00:00 is | |
| 421 | assumed. If only the seconds component | |
| 422 | is omitted, :00 is assumed. If the | |
| 2ab38e24 | 423 | date component is omitted, the |
| cfbc22ab LP |
424 | current day is assumed. Alternatively |
| 425 | the strings | |
| 426 | <literal>yesterday</literal>, | |
| 427 | <literal>today</literal>, | |
| 428 | <literal>tomorrow</literal> are | |
| 429 | understood, which refer to 00:00:00 of | |
| 430 | the day before the current day, the | |
| 16dad32e AE |
431 | current day, or the day after the |
| 432 | current day, respectively. <literal>now</literal> | |
| cfbc22ab LP |
433 | refers to the current time. Finally, |
| 434 | relative times may be specified, | |
| 435 | prefixed with <literal>-</literal> or | |
| 436 | <literal>+</literal>, referring to | |
| 16dad32e AE |
437 | times before or after the current |
| 438 | time, respectively.</para></listitem> | |
| cfbc22ab LP |
439 | </varlistentry> |
| 440 | ||
| 15119c16 | 441 | <varlistentry> |
| 9536e0e1 | 442 | <term><option>-F</option></term> |
| a7f5bb1e | 443 | <term><option>--field=</option></term> |
| 15119c16 LP |
444 | |
| 445 | <listitem><para>Print all possible | |
| 446 | data values the specified field can | |
| 447 | take in all entries of the | |
| 448 | journal.</para></listitem> | |
| 449 | </varlistentry> | |
| 450 | ||
| 3f3a438f ZJS |
451 | <varlistentry> |
| 452 | <term><option>--system</option></term> | |
| 453 | <term><option>--user</option></term> | |
| 454 | ||
| 455 | <listitem><para>Show messages from | |
| 456 | system services and the kernel (with | |
| 457 | <option>--system</option>). Show | |
| 458 | messages from service of current user | |
| 459 | (with <option>--user</option>). | |
| 460 | If neither is specified, show all | |
| 461 | messages that the user can see. | |
| 462 | </para></listitem> | |
| 463 | </varlistentry> | |
| 464 | ||
| a963990f | 465 | <varlistentry> |
| 8d98da3f ZJS |
466 | <term><option>-D <replaceable>DIR</replaceable></option></term> |
| 467 | <term><option>--directory=<replaceable>DIR</replaceable></option></term> | |
| 468 | ||
| 469 | <listitem><para>Takes a directory path | |
| 470 | as argument. If specified journalctl | |
| 471 | will operate on the specified journal | |
| 472 | directory | |
| 473 | <replaceable>DIR</replaceable> instead | |
| 474 | of the default runtime and system | |
| 475 | journal paths.</para></listitem> | |
| 476 | </varlistentry> | |
| 477 | ||
| 478 | <varlistentry> | |
| 479 | <term><option>--file=<replaceable>GLOB</replaceable></option></term> | |
| 480 | ||
| 481 | <listitem><para>Takes a file glob as | |
| 482 | argument. If specified journalctl will | |
| 483 | operate on the specified journal files | |
| 484 | matching <replaceable>GLOB</replaceable> | |
| 485 | instead of the default runtime and | |
| 486 | system journal paths. May be specified | |
| 487 | multiple times, in which case files will | |
| 488 | be suitably interleaved.</para></listitem> | |
| a963990f LP |
489 | </varlistentry> |
| 490 | ||
| 13cbf3a5 ZJS |
491 | <varlistentry> |
| 492 | <term><option>--root=<replaceable>ROOT</replaceable></option></term> | |
| 493 | ||
| 494 | <listitem><para>Takes a directory path | |
| 495 | as argument. If specified journalctl | |
| 496 | will operate on catalog file hierarchy | |
| 497 | underneath the specified directory | |
| 498 | instead of the root directory | |
| 499 | (e.g. <option>--update-catalog</option> | |
| 500 | will create | |
| 501 | <filename><replaceable>ROOT</replaceable>/var/lib/systemd/catalog/database</filename>). | |
| 502 | </para></listitem> | |
| 503 | </varlistentry> | |
| 504 | ||
| 31094aae LP |
505 | <varlistentry> |
| 506 | <term><option>--new-id128</option></term> | |
| 507 | ||
| 508 | <listitem><para>Instead of showing | |
| 509 | journal contents generate a new 128 | |
| 510 | bit ID suitable for identifying | |
| 511 | messages. This is intended for usage | |
| 512 | by developers who need a new | |
| 513 | identifier for a new message they | |
| 514 | introduce and want to make | |
| 515 | recognizable. Will print the new ID in | |
| 516 | three different formats which can be | |
| 517 | copied into source code or | |
| 518 | similar.</para></listitem> | |
| 519 | </varlistentry> | |
| 520 | ||
| 521 | <varlistentry> | |
| 522 | <term><option>--header</option></term> | |
| 523 | ||
| 524 | <listitem><para>Instead of showing | |
| 525 | journal contents show internal header | |
| a0b78ede | 526 | information of the journal fields |
| 31094aae | 527 | accessed.</para></listitem> |
| a1a03e30 LP |
528 | </varlistentry> |
| 529 | ||
| 530 | <varlistentry> | |
| 531 | <term><option>--disk-usage</option></term> | |
| 532 | ||
| 533 | <listitem><para>Shows the current disk | |
| 534 | usage of all | |
| 535 | journal files.</para></listitem> | |
| d4205751 LP |
536 | </varlistentry> |
| 537 | ||
| 538 | <varlistentry> | |
| 54b7254c ZJS |
539 | <term><option>--list-catalog |
| 540 | <optional><replaceable>ID128...</replaceable></optional> | |
| 541 | </option></term> | |
| d4205751 LP |
542 | |
| 543 | <listitem><para>List the contents of | |
| 544 | the message catalog, as table of | |
| 545 | message IDs plus their short | |
| 54b7254c ZJS |
546 | description strings.</para> |
| 547 | ||
| 548 | <para>If any | |
| 549 | <replaceable>ID128</replaceable>s are | |
| 550 | specified, only those entries are shown. | |
| 551 | </para> | |
| 552 | </listitem> | |
| 553 | </varlistentry> | |
| 554 | ||
| 555 | <varlistentry> | |
| 556 | <term><option>--dump-catalog | |
| 557 | <optional><replaceable>ID128...</replaceable></optional> | |
| 558 | </option></term> | |
| 559 | ||
| 560 | <listitem><para>Show the contents of | |
| 561 | the message catalog, with entries | |
| 562 | separated by a line consisting of two | |
| 563 | dashes and the id (the format is the | |
| 564 | same as <filename>.catalog</filename> | |
| 565 | files.</para> | |
| 566 | ||
| 567 | <para>If any | |
| 568 | <replaceable>ID128</replaceable>s are | |
| 569 | specified, only those entries are shown. | |
| 570 | </para> | |
| 571 | </listitem> | |
| d4205751 LP |
572 | </varlistentry> |
| 573 | ||
| 574 | <varlistentry> | |
| 575 | <term><option>--update-catalog</option></term> | |
| 576 | ||
| 577 | <listitem><para>Update the message | |
| 578 | catalog index. This command needs to | |
| 579 | be executed each time new catalog | |
| 580 | files are installed, removed or | |
| 581 | updated to rebuild the binary catalog | |
| 582 | index.</para></listitem> | |
| 31094aae LP |
583 | </varlistentry> |
| 584 | ||
| 585 | <varlistentry> | |
| 586 | <term><option>--setup-keys</option></term> | |
| 587 | ||
| 588 | <listitem><para>Instead of showing | |
| 589 | journal contents generate a new key | |
| 590 | pair for Forward Secure Sealing | |
| 591 | (FSS). This will generate a sealing | |
| 592 | key and a verification key. The | |
| 593 | sealing key is stored in the journal | |
| 594 | data directory and shall remain on the | |
| 595 | host. The verification key should be | |
| fe004b7c LP |
596 | stored externally. Also see the |
| 597 | <option>Seal=</option> option in | |
| 598 | <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
| 599 | for details.</para></listitem> | |
| 31094aae LP |
600 | </varlistentry> |
| 601 | ||
| 602 | <varlistentry> | |
| 603 | <term><option>--interval=</option></term> | |
| 604 | ||
| 605 | <listitem><para>Specifies the change | |
| 606 | interval for the sealing key, when | |
| 607 | generating an FSS key pair with | |
| 608 | <option>--setup-keys</option>. Shorter | |
| 609 | intervals increase CPU consumption but | |
| 610 | shorten the time range of | |
| 611 | undetectable journal | |
| 612 | alterations. Defaults to | |
| 613 | 15min.</para></listitem> | |
| 614 | </varlistentry> | |
| 615 | ||
| 616 | <varlistentry> | |
| 617 | <term><option>--verify</option></term> | |
| 618 | ||
| 619 | <listitem><para>Check the journal file | |
| 620 | for internal consistency. If the | |
| 621 | file has been generated with FSS | |
| 622 | enabled, and the FSS verification key | |
| 623 | has been specified with | |
| 624 | <option>--verify-key=</option> | |
| 625 | authenticity of the journal file is | |
| 626 | verified.</para></listitem> | |
| 627 | </varlistentry> | |
| 628 | ||
| 629 | <varlistentry> | |
| 630 | <term><option>--verify-key=</option></term> | |
| 631 | ||
| 632 | <listitem><para>Specifies the FSS | |
| 633 | verification key to use for the | |
| 634 | <option>--verify</option> | |
| 635 | operation.</para></listitem> | |
| 636 | </varlistentry> | |
| 637 | ||
| 2af777ba LP |
638 | </variablelist> |
| 639 | </refsect1> | |
| 640 | ||
| 641 | <refsect1> | |
| 642 | <title>Exit status</title> | |
| 643 | ||
| 644 | <para>On success 0 is returned, a non-zero failure | |
| 645 | code otherwise.</para> | |
| 646 | </refsect1> | |
| 647 | ||
| 648 | <refsect1> | |
| 649 | <title>Environment</title> | |
| 650 | ||
| ccc9a4f9 | 651 | <variablelist class='environment-variables'> |
| 2af777ba LP |
652 | <varlistentry> |
| 653 | <term><varname>$SYSTEMD_PAGER</varname></term> | |
| 654 | <listitem><para>Pager to use when | |
| 655 | <option>--no-pager</option> is not given; | |
| 656 | overrides <varname>$PAGER</varname>. Setting | |
| 657 | this to an empty string or the value | |
| 658 | <literal>cat</literal> is equivalent to passing | |
| 659 | <option>--no-pager</option>.</para></listitem> | |
| 660 | </varlistentry> | |
| 661 | </variablelist> | |
| 662 | </refsect1> | |
| 663 | ||
| cbdca852 LP |
664 | <refsect1> |
| 665 | <title>Examples</title> | |
| 666 | ||
| 667 | <para>Without arguments all collected logs are shown | |
| 668 | unfiltered:</para> | |
| 669 | ||
| 670 | <programlisting>journalctl</programlisting> | |
| 671 | ||
| 672 | <para>With one match specified all entries with a field matching the expression are shown:</para> | |
| 673 | ||
| 674 | <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service</programlisting> | |
| 675 | ||
| 676 | <para>If two different fields are matched only entries matching both expressions at the same time are shown:</para> | |
| 677 | ||
| 678 | <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097</programlisting> | |
| 679 | ||
| 680 | <para>If two matches refer to the same field all entries matching either expression are shown:</para> | |
| 681 | ||
| 682 | <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _SYSTEMD_UNIT=dbus.service</programlisting> | |
| 683 | ||
| 684 | <para>If the separator "<literal>+</literal>" is used | |
| a0b78ede | 685 | two expressions may be combined in a logical OR. The |
| cbdca852 LP |
686 | following will show all messages from the Avahi |
| 687 | service process with the PID 28097 plus all messages | |
| 688 | from the D-Bus service (from any of its | |
| 689 | processes):</para> | |
| 690 | ||
| 691 | <programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097 + _SYSTEMD_UNIT=dbus.service</programlisting> | |
| 692 | ||
| b6a34514 LP |
693 | <para>Show all logs generated by the D-Bus executable:</para> |
| 694 | ||
| 695 | <programlisting>journalctl /usr/bin/dbus-daemon</programlisting> | |
| 696 | ||
| 845c5324 | 697 | <para>Show all logs of the kernel device node <filename noindex='true'>/dev/sda</filename>:</para> |
| b6a34514 LP |
698 | |
| 699 | <programlisting>journalctl /dev/sda</programlisting> | |
| 700 | ||
| cbdca852 LP |
701 | </refsect1> |
| 702 | ||
| 2af777ba LP |
703 | <refsect1> |
| 704 | <title>See Also</title> | |
| 705 | <para> | |
| 706 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
| 01cf0ca8 | 707 | <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| 2af777ba | 708 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
| ffa16db0 | 709 | <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
| 18b754d3 | 710 | <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
| 2af777ba LP |
711 | </para> |
| 712 | </refsect1> | |
| 713 | ||
| 714 | </refentry> |