Shell Programming and Scripting

Hi,
I need to conver the date format to binary and then subract it by one which will result me an output with yesterdays date and use it..
So that i will use the out and delete all the folders which are of minus one days.i.e if today is 2010-03-18 (this is a folder format at some xyz location).
Now the script will search for the previous days folder and files in it and simply delete it....
Please help..

Regards,
PAN

Code:

date --date='1 day ago' #full date format

execute this command this command itself will give the yesterdays date

Code:

date +%d --date='1 day ago'  #only the yesterday's date

And you can have a look at this amazing thread...

https://www.unix.com/answers-frequent...rithmetic.html

To get the yesterday's date there is a way in date command ,

Code:

echo `date "+%d/%m/%Y" -d "-1 day"`

gr8...Thanks...
Now with that yesterdays date, a date folder gets created by some other script..
How to delete that folder and files in it.

Store that date in a variable.
Say

Code:

$dir=`date +%d --date='1 day ago'`

Now the variable $dir will have the yesterday's date value. This will be a directory name
means you can delete this directory and files in it using the following command

Code:

rm -rf ${dir}

If that directory is in some other path you need to specify the path exactly in the rm command's parameter.

Example:

Code:

rm -rf /home/user1/${dir}

but if this dir is at location say /usr/sam/pan/2010-03-17,
how will the script looks like..
I just need to put this is cront in such a way that it will search this folder 2010-03-17 and delete that and files in it..
This will be an on going process as deleting the folder and files manually i a big pain..
Also this folder get created everyday with todays date, so need to automate it and put in cron..