HOW to set up CRON JOB file using putty?

Using following step, you can set cronjob

1.) SSH or telnet into your account.
2.) At the prompt, type in 'crontab -e'. This will open up your crontab file, or create a new one if it doesn't exist.
When this file opens, you will see other cron jobs listed in here, or if you haven't any - you'll see a bunch of lines with '~' on them.
3.) Use the cursor to go down until you can't move the cursor down any more. This is where you start your new line. Press 'o' to insert a new line.
4.) Press 'o' to insert a new line. If you want to edit a line, press 'i'.
5.) Copy the code above, then right click into your SSH or telnet client to paste the above code in. This should all go in as a new line.
6.) Press the 'esc' key to exit out of edit mode.
7.) To save the changes and exit, type the following in: ZZ
If you want to exit without saving changes, type in: :q!

# Minute   Hour   Day of Month       Month          Day of Week        Command    
# (0-59)  (0-23)     (1-31)    (1-12 or Jan-Dec)  (0-6 or Sun-Sat)                
    0        2          12             *               0,6           /usr/bin/php /vr/www/html/vpe/mail.php

30 23 * * * /usr/bin/php /var/www/html/vpe/mail.php  

that means above cron will run daily at 23:30 i.e., 11:30 PM 

and you'r done.

Cheers!