Shell Programming and Scripting

I want to write a script which will automatically take password
sequentially from a file after every 10 days.
i.e the passwd command should be executed automatically every 10 days and it should take the input from the password file sequentially.

Has any1 got a solution??????????????

the find cmd allow you to find a file matching time criteria:

find /etc/passwd -mtime 10

will return a filename only if the file have been modified ten days ago.
Using the crontab you can trigger a script (every day) looking for the modifcation date of the file as first check.

To loop sequentially on file you can use the following (wrotten by perderabo)
exec < /etc/passwd
i=0
while read array1[i] ; do
((i=i+1))
done