One of the easiest programs to use in making backups is Taper.
If you have used Backup Exec for Netware it is "somewhat" similar - (Not much really,but; enough to get the "gist") You will have to start it from a terminal (console) window with a command set of instructions. (Do a man taper to get a list of it's command set). What you need to remember is that to access your tape drive, you while need to specify the type of I/O interface (floppy, SCSI, IDE) such as -
taper -T s
The "s" is for SCSI. Again the the list of tape type options can be pulled up by doing "man taper". And if you can't stand man pages,try out
http://taper.e-survey.net.au/taper.html
Good Luck
Note: If you do use taper in the unattended mode with cron and get a message like this
"No such file or directory . . ."
the problem is with the cron's home path. Either, reset your file paths in taper to match cron's home path or changes cron's home path to match the info path in taper's. preference file.