root@kali:~$ shred -u -n 20 -z -v whoami.html
shred: whoami.html: pass 1/21 (random)...
shred: whoami.html: pass 2/21 (b6db6d)...
shred: whoami.html: pass 3/21 (db6db6)...
shred: whoami.html: pass 4/21 (333333)...
shred: whoami.html: pass 5/21 (aaaaaa)...
shred: whoami.html: pass 6/21 (c92492)...
shred: whoami.html: pass 7/21 (492492)...
shred: whoami.html: pass 8/21 (249249)...
shred: whoami.html: pass 9/21 (000000)...
shred: whoami.html: pass 10/21 (edb6db)...
shred: whoami.html: pass 11/21 (random)...
shred: whoami.html: pass 12/21 (6db6db)...
shred: whoami.html: pass 13/21 (111111)...
shred: whoami.html: pass 14/21 (800000)...
shred: whoami.html: pass 15/21 (124924)...
shred: whoami.html: pass 16/21 (555555)...
shred: whoami.html: pass 17/21 (eeeeee)...
shred: whoami.html: pass 18/21 (924924)...
shred: whoami.html: pass 19/21 (ffffff)...
shred: whoami.html: pass 20/21 (random)...
shred: whoami.html: pass 21/21 (000000)...
shred: whoami.html: removing
shred: whoami.html: renamed to 00000000
shred: 00000000: renamed to 0000000
shred: 0000000: renamed to 000000
shred: 000000: renamed to 00000
shred: 00000: renamed to 0000
shred: 0000: renamed to 000
shred: 000: renamed to 00
shred: 00: renamed to 0
shred: whoami.html: removed