On Ubuntu 18.04,
man cron says
cron logs its action to the syslog facility 'cron', and logging may be controlled using the standard syslogd(8) facility
Also, the default configuration of cron is controlled by /etc/default/cron which is read by the init.d script that launches the cron daemon. This file determines whether cron will read the system's environment variables and makes it possible to add additional options to the cron program before it is executed, either to config‐ ure its logging or to define how it will treat the files under /etc/cron.d.
I added a job into
* * * * * t ( date && echo $PATH && date )
I try to look up the output of the job, and why couldn't I find it in syslog? Thanks.
$ less /var/log/syslog ... Nov 3 12:21:01 ocean CRON: (t) CMD (( date && echo $PATH && date ) ) Nov 3 12:21:01 ocean CRON: (CRON) info (No MTA installed, discarding output) $ cat /etc/default/cron # This file has been deprecated. Please add custom options for cron using # $ systemctl edit cron.service # or # $ systemctl edit --full cron.service