I am trying to schedule a script in Linux to between 8th and the 31st of each month on Sundays @ 6:50 only and i scheduled it as follows:
50 6 8-31 * 0 ksh /home/cpac/SPID_Files/GetFiles.ksh
Which did it run on the 8th on Saturday instead of only Sundays !!!
That isn't the way cron works. The crontab entry:
50 6 8-31 * 0 ksh /home/cpac/SPID_Files/GetFiles.ksh
specfies that the command ksh /home/cpac/SPID_Files/GetFiles.ksh is to be run at 06:50 on every day that is a Sunday and on every day with a day of month that is is from 8 through 31 inclusive. So, in November 2014, it would run on the 2nd and the 8th through the 30th.
Don's very clear message is that both day of the week and day of the month are both going to act independently to run the job at 6:50 AM
You have to check either the day of the week or the day of the month outside of the * * * * section of the crontab line, and drop that check in the section. Both together do not fly the way you want.
try:
set the Sunday ( 0 ) to a * then add logic to see if it is Sunday:
50 6 8-31 * * [ `date +%w` -eq 0 ] && ksh /home/cpac/SPID_Files/GetFiles.ksh
I also figured it out as follows:
50 6 8-31 * * [ "$(date '+\%a')" == "Sun" ] && /home/cpac/scripts/CommandLine/GetFiles.ksh
Thank you Jim. Your suggestion is great too.