...The following wiping methods are supported: Gutmann-like, random, Schneier, DoD.
See the project homepage https://libsecrm.sourceforge.io and the project Wiki in the menu above.
To wipedata that was left on the drive by using "normal" delete operations, you can take a look at WipeFreeSpace (https://wipefreespace.sourceforge.io), which wipes the space used by files marked as deleted (and other things, too).
A disk schredder application for debian-linux systems
This application wipes your storage units (HDDs, SSDs, and flash drives) and renders them unrecoverable. This process is irreversible, and the data cannot be recovered later. Using this application is especially recommended if you're considering selling your storage units. The program is powered by the default kernel module, the "shred" tool. It's bilingual (English and Turkish) and easy to use. Simply select your drive and click the "Destroy!" button....
ShredBitz is a free and simple file shredder tool that can wipe selected files from any hard disk drive. ShredBitz is written in the java programming language and uses a custom written algorithm for shredding.
ShredBitz is a very powerful tool.