I'm a total newbie to UNIX and I'm wondering what is the best way to completely wipe out a hard disk? For example, for a windows system, what I would do is just delete all partitions to completely wipe out the disk. I researched on google for quite some time and I'm coming across this "dd" command, but I'm not exactly sure if thats what I'm suppose to use. Any help would be appreciated. Oh yea this will be done on a solaris sparc20 system.