Journalctl

옵션

-t --identifier=STRING Show entries with the specified syslog identifier

$ journalctl --identifier=cron

-f --follow Follow the journal

-o --output=STRING Change journal output mode (short, short-precise, short-iso, short-full, short-monotonic, short-unix, verbose, export, json, json-pretty, json-sse, cat)

$ journalctl -o verbose -t quotaon 

-a --all Show all fields, including long and unprintable

-x --catalog Add message explanations where available

-S --since=DATE Show entries not older than the specified date

$ journalctl --since=today