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0,5,10,15,20,25,30,35,40,45,50,55 * * * * date +"%H:%M:%S" >> /tmp/somegroovyfile.txt
man crontab said:The sixth field of a line in a crontab file is a string that
is executed by the shell at teh specified times. A percent character in this field (unless excaped by \) is translated to a NEWLINE character.