Shell Programming and Scripting

Hi

I have written a script which restarts the application , I want to add a piece of code in my script , to make sure this gets executed only on sunday .
So that even if someone runs it on any other day by mistake it should exit throwing an error message . Can someone please assist what will be the code for this .

I wrote something like this -

Code:

week=`date|awk '{print $1}'`

if [ $week == "Sun" ]

then 

script code 

else 

exit

fi

Is it fine ? Please give suggestions if there is any other better way to this ?

I think it's fine. I changed it a little.

Code:

day=`date | awk '{print $1}'`

if [ $day = "Sun" ]
then
  script code
else
  exit
fi

Why to use awk if date command itself has an option to print abbreviated weekday name!

Code:

date +"%a"

Why not put the script details in CRON and schedule it to run only on SUNDAYS every week.It doesn't need manual efforts to run the script

Code:

[ $(date +"%w") -eq 0 ] && script code || exit

This is a very typical job for cron

Code:

crontab -e

add

Code:

00 00 * * 0 /div/yourscript

runs 0:00 every sunday

while working in crontab, one must be careful about fields & respective timings