Every time a cron job is executed, an entry will be added to syslog, no matter whether the job succeeded or not. I have a couple of crons that run every minute, so syslog gets awfully cluttered with useless lines. Adding
> /dev/null or
> /dev/null 2>&1 to the job commands doesn’t help.
Fortunately cron logging can be configured, in
/etc/default/cron. Log levels are explained in that file:
# Or, to log standard messages, plus jobs with exit status != 0: # EXTRA_OPTS='-L 5' # # For quick reference, the currently available log levels are: # 0 no logging (errors are logged regardless) # 1 log start of jobs # 2 log end of jobs # 4 log jobs with exit status != 0 # 8 log the process identifier of child process (in all logs) # # EXTRA_OPTS=""
The default is to log the start of every job. I uncommented the last line and set it to
Then, restart the cron daemon: