I''m not going to tell you what to do, but I'll give you some leads otherwise you learn nothing from it.
For cron, you can start by running crontab -e to edit your current cron config for THE USER YOU ARE CURRENTLY LOGGED IN AS. If you want to set a system-wide cron entry, then it varies with each OS slightly. However, there SHOULD be a /etc/crontab that you can put junk into.
As for the config of crontab, run 'man 5 crontab' and that will describe to you how to make a cron entry.
To find the files you are looking for, you will want to use the 'find' command. Again, 'man find' will show you all the options. You should draw your attention to the -ctime option that allows you to specify how long ago the file was changed.
Lastly, you may want to brush up on your bash commands and how to do a for-loop.
Something like for blah in `ls -a .`; do echo $blah >> somefile.txt; done; will, for example print all the lines returned by the command la -a . into the file somefile.txt.
Your solution will make use of the above but instead of doing an ls -a , you will be using the find command. Oh, and perhaps 'date'!
Enjoy.
QUOTE (CALIbrated @ Oct 5 2009, 01:36 PM)

you dont have to be a linux guru to be an IT guru.
personally, i hate linux. but give me anything MS related (servers) and im happy. ps. i've done my linux courses, so i'm capable

i just dont like using it, unless i have to. and ubuntu was developed in a garage 20km from where i used to live.

Command line is a bit too complicated?

QUOTE (Mr.B @ Oct 6 2009, 06:47 AM)

Speaking of ubuntu, how is it? I'm tempted to set up a virtual machine to run it one for a play around.
It's great! It's everything you love about Debian (package management) with commercial support and faster release cycles.