sfill

Securely overwrite the free space and inodes of the partition where the specified directory resides.

TLDR

Overwrite free space and inodes of a disk with 38 writes (slow but secure)

$ sfill [/path/to/mounted_disk_directory]
copy

Overwrite free space and inodes of a disk with 6 writes (fast but less secure) and show status

$ sfill -l -v [/path/to/mounted_disk_directory]
copy

Overwrite free space and inodes of a disk with 1 write (very fast but insecure) and show status

$ sfill -ll -v [/path/to/mounted_disk_directory]
copy

Overwrite only free space of a disk

$ sfill -I [/path/to/mounted_disk_directory]
copy

Overwrite only free inodes of a disk

$ sfill -i [/path/to/mounted_disk_directory]
copy

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