Subject is covered in any basic Unix (Linux) course and in almost any book about this topic, also look manual pages: cron( crontab(5) crontab(1)
Also there are many tutorials on net like this one:
Need expert advice, for asset management purpose we would like to get computer HW/SW configuration on daily basis. We're currently using Redhat linux3 tarron7 with smartestversions installed.
We want to do it using cron file that will automatically send into server.
Thanks in advance.