UNIX for Advanced & Expert Users

Hi

I am new to unix.

I have to set up a cron for the program , which should run every Monday at 3 a.m, however , if the date is between the 5 th and the 15th of January,APril or December, the program should not run


I know i cant do this in cron , Help with writing the if contion is appreciated.

Thank You

I am not convinced that this can not be done in cron. However, I would set my cron to run a script for every Monday at 3am.
Then, at the beginning of the script, have IT check the date to see if conditions are met to continue or exit. Start with something like:

Code:

> day=`date '+%d'`
> echo $day
06
> month=`date '+%m'`
> echo $month
05

then if statements to validate the day of month and month number.

Thank you for ur reply :-
can u pls tell me is this correct :-

vi crontest.sh

#!/bin/bash
Date='date +%d'
Month='date +%m'
Day='date +%a'
if[["$Date" -ge "05" && "$Date" -le "15"] && ["$Month" -eq "01" -o "$Month" -eq "04" -o "$Month" -eq "12"] && ["&Day" = "Mon"]]; then
exit()
else
RunTheShell.sh
fi


once i create this shell script which runs the shell RunTheShell.sh , only when the Monday doesnot fall between 05 and 15 th of the month jan , april and dec .

Where and how should i set the crontest.sh to run on every monday at 3am .


pls help me how to do this..
Thank You

If you set your cron as
0 3 * * 1 crontest.sh

Then you won't have to deal with the DAY variable.
I think the following is 'better', but I might still be missing something.

Code:

#!/bin/bash
Date='date +%d'
Month='date +%m'

if [["$Date" -ge 05 && "$Date" -le 15] && ["$Month" -eq 01 -o "$Month" -eq 04 -o "$Month" -eq 12]]
  then
  exit 99   # habit, exit with return code on error
fi

RunTheShell.sh
# or simply the command you want to do

Thank You So much .

I want to know how to setup crontab

at the unix prompt i gave
$crontab -e

the reply i got is 108

how to create it pls

crontab -e returned an error - you need to get your sysadmin to help. You may not have access to crontab.

Check if you have access to edit the cron tab,

cat /etc/cron.allow ----> if your user account is not present in this file, then you have to contact your administrator to give you the access