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Updated description for usage with journald.

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Tristan Ramseyer 2018-08-25 17:32:34 +02:00 committed by GitHub
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README.md
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@ -83,10 +83,23 @@ output format to include the year, otherwise `lnav` gets confused:
$ journalctl -o short-iso | lnav
It is also possible to use `journalctl`'s json output format and `lnav`
will make us of additional fields such as PRIORITY and _SYSTEMD_UNIT:
$ journalctl -o json | lnav
If using systemd v236 or newer, the output fields can be limited to
the ones actually recognized by `lnav` for increased efficiency:
$ journalctl -o json --output-fields=MESSAGE,PRIORITY,_PID,SYSLOG_IDENTIFIER,_SYSTEMD_UNIT | lnav
If your system has been running for a long time, for increased
efficiency you may want to limit the number of log lines fed into
`lnav`, e.g. via `journalctl`'s `-n` or `--since=...` options.
In case of a persistent journal, you may want to limit the number
of log lines fed into `lnav` via `journalctl`'s `-b` option.
## Screenshot