HOWTO vixie-cron notes
On a hardened gentoo machine, the main /var/log/messages file becomes hugely cluttered with the minute-by-minute cron messages. They are far too verbose :-( Cut down on the clutter by editing and adding the red/bold change:
hostname ~ # emacs -nw /etc/syslog-ng/syslog-ng.conf filter f_messages { level(info..warn) and not facility(auth, authpriv, mail, news, cron); };
Minute-by-minute cron messages are still logged, but only to /var/log/cron.log, not the main /var/log/messages file. Sanity is restored :-)