sfill
linux
Securely overwrite the free space and inodes of the partition where the specified directory resides.
More info →Examples (5)
Overwrite free space and inodes of a disk with 38 writes (slow but secure)
sfill /path/to/mounted_disk_directoryOverwrite free space and inodes of a disk with 6 writes (fast but [l]ess secure) and show status ([v]erbose)
sfill -l -v /path/to/mounted_disk_directoryOverwrite free space and inodes of a disk with 1 write (very fast but [l]ess secure [v]erbose) and show status
sfill -ll -v /path/to/mounted_disk_directoryOverwrite only free space of a d[I]sk
sfill -I /path/to/mounted_disk_directoryOverwrite only free [i]nodes of a disk
sfill -i /path/to/mounted_disk_directorymade by @shridhargupta | data from tldr-pages