I think the way I am asking is sth wrong. My problem is I edit the
crontab by -e , and by -l , I find the task is list in the crontab,
However I canot find the result of the crontab. My crontab is
following:

50 15 12 * 2,4 /sbin/ping -c 100 -s 1000  www.yahoo.com >>
$HOME/data/test_perl/try1.txt

I supposed to find some data in the try1.txt. however , it is nothing
in the file. SO I can check if the crontab is running according to the
schedule. and how to verify that ? Thanks for any comments

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