F20 - Unintended consequences of no default MTA - How best to fix
Lars E. Pettersson
lars at homer.se
Fri Jan 3 23:26:21 UTC 2014
On 01/03/2014 09:56 PM, Pete Travis wrote:
> > > $ journalctl SYSLOG_IDENTIFIER=CROND -f #filtered for convenience
> >
> > How do you know which IDENTIFIER to use? I could guess it should be
> > CROND if I were to look at the output of journalctl in this case; but is
> > there any canonical way to find this out? Or is it just the unit file
> > name?
>
> I picked that by looking at the messages and pairing up the identifier
> with my messages. It's reasonable to assume this will be consistent for
> cron jobs, so I didn't demonstrate that part.
It should perhaps be added that jounralctl has auto completion. Write
jounralctl and press tab twice to see what you can use, type 'journalctl
SYSLOG_IDENTIFIER=' and press tab twice, and you can see what to use there.
With auto completion I see crond, CROND, and crontab. (None of these
will give me the output from cron by the way.) What is the difference
between crond and CROND?
> `journalctl -o verbose' gives the extra metadata. There are other output
> formats, ie json, but this seemed most useful here.
Thanks, that answered my question in the earlier mail from me.
> key. There is a section in the System Administrators Guide on the
> journal, which I will probably update this weekend since the usage is
> newly fresh in my mind. It won't be published for f20 immediately, but
> I can push a draft if anyone is interested in reviewing. (Hint, readers,
> speak up, or I won't do the extra work)
OK, count me in... Could be a good way to get to know that system a bit
better.
Lars
--
Lars E. Pettersson <lars at homer.se>
http://www.sm6rpz.se/
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