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b088086b06
Now, it's all under the notebook umbrella. Seems to be appropriate as it is just my notes after all. I also updated some notes from there. I didn't keep track of what it is this time. Something about more learning notes extracted from my "Learning how to learn" course notes and then some. Lack of time and hurriness just makes it difficult to track but it should be under version control already.
58 lines
1.3 KiB
Org Mode
58 lines
1.3 KiB
Org Mode
:PROPERTIES:
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:ID: 941e0a85-1bb4-45be-a729-1b577c7ee317
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:END:
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#+title: Command line: journalctl
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#+date: "2021-05-20 23:07:39 +08:00"
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#+date_modified: "2021-07-20 23:31:16 +08:00"
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#+language: en
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#+property: header-args :results none
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The logging daemon of systemd.
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(Ooooh...)
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Not only it can view your logs, you can ask to view specific logs and delete some of them.
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For more information, see =journalctl.1= manual page.
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* Options
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- =-b, --boot= - show the logs starting from boot time
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- =-e, --pager-end= - go to the end of the logs
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- =-f, --follow= - watch the logs
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- =--user-unit= - show logs from a user unit
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- =-u, --unit [UNIT]= - show the logs of a system unit
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- =--vacuum-time [TIMESPAN]= - delete logs older than the specified timespan [fn:: View =systemd.time.5= for more information.]
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- =-x, --catalog= - prints helpful messages such as the documentation URIs
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* Examples
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This tool is already comprehensive.
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Needs a comprehensive database of examples to fight against this scope.
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** Watch the logs from a specific unit at boot time
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#+begin_src
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journalctl --user-unit borgbackup.service -fb
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#+end_src
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** Delete the logs older than a month
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#+begin_src
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journalctl --vacuum-time=1m
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#+end_src
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** View the latest logs with helpful messages
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#+begin_src
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journalctl -xe
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#+end_src
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