Two command-lines I use to view my Postfix logs:
journalctl --unit postfix --since "2 days ago"journalctl --unit postfix --pager-end
Note that neither of these work well with the
--follow(or equivalent-f) option, as this will effectively disable the pager (which by default isless).
The second is via [Wayback] systemd – How to see the latest x lines from systemctl service log – Unix & Linux Stack Exchange (which got the--pagerend bit wrong, as it misses a dash and should be --pager-end, but still thanks [Wayback] Daniel Kmak):
Just:
journalctl -u SERVICE_NAME -eParameter
-estands for:-e –pagerend
…
That’s the one ! Other answers will go through the whole log to get to its end, which can be veeeeery long for large syslogs.
The last bit (by [Wayback] Léo Germond, thanks!) is why I like it most.
Similarly, specifying --since in the first example will not go through the whole log.
Some background information:
The Wiert Corner - irregular stream of stuff 