how to schedule cron jobs in linux

[yogesh kumar_2]

Hi,

I have written one backup script called su_backup(/root/su_backup).so i want to move these backup script through cronjobs at night 12 '0' clock to /net/ss-bc/sub_backup(the path i have included in the su_backup script)
for ex:
I have scheduled each and every minute

* * * * * /root/su_backup.

But it is not working.