4 Aug
2004
4 Aug
'04
22:42
Indeed, so */18 is the same as stepping from 0 to 23 with a step of 18. In other words, */18 is equivalent to 0,18. The actual code in cron is
for (i = num1; i <= num2; i += num3) if (EOF == set_element(bits, low, high, i)) return EOF;
In this case, num1 is 0, num2 is 23 and num3 is 18
Also note the "60 times" remark. You had * for the minute field, which means it will execute once per minute every minute in the hour given
Ok I see now!