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Questions tagged [shred]

1 vote
0 answers
50 views

Shred command results in faulty keyboard

On at least three Lenovo Laptops, many keys no longer work following the use of the shred command. I used a bootable Ubuntu USB key. Within the Ubuntu OS, in the terminal window: sudo fdisk -l sudo ...
user653821's user avatar
0 votes
0 answers
450 views

Can `shred` show estimate remaining time?

I used -vfz and it shows the size and percentage of current wiped amount, but I would like to see the remaining time. I think I can calculate time myself, because it seems that it wipes about 630 MB ...
Damn Vegetables's user avatar
-1 votes
1 answer
2k views

How to quickly and securly erase data on a disk?

I'm going to securely erase the data on a HDD so that I can donate it. I use shred which is a specialized the tool for this puprose. So I run shred -vfz /dev/sdd1 and it does its job: shred: /dev/...
blnks's user avatar
  • 219
0 votes
0 answers
1k views

Why is the shred command so slow at zeroing some models of hard drives? (like Seagate Barracuda ES.2)

When used, with -n0 (that is without the three initial random passes of the default option) the shred command is usually fast at zeroing hard drives: shred -n0 -z -v -f /dev/sdb However, I observed ...
OuzoPower's user avatar
  • 241
17 votes
3 answers
10k views

How can I verify that my hard disk has been zeroed / wiped?

I used shred to wipe my external hard disk: sudo shred -vz /dev/sdb I should also add that the disk had 5 bad sectors. I want to verify the disk has been zeroed, per https://superuser.com/questions/...
NoExpert's user avatar
  • 499
4 votes
3 answers
2k views

Using "shred" on BSD systems

Linux has shred, from the GNU coreutils package, to securely overwrite data in-place when removing files. What is the equivalent on BSD systems (and specifically on macOS)?
CarriMegrabyan's user avatar
0 votes
1 answer
659 views

Shredding one partition messes up whole external drive

I used the "shred" command on Linux to wipe a specific partition on my HDD (just a once-over with zeroes; no extra passes of random data). The command I used: shred -uvz -n 0 /dev/sda But ...
user528665's user avatar
3 votes
1 answer
927 views

Output to variable or file using (find with -exec and shred)

I have a find command that I exec to shred and it works great; however, I need to capture the output of this and pass to a variable or a file. I have tried so many iterations of the below commands, ...
John Riordan's user avatar
2 votes
1 answer
3k views

How to use the shred command the right way?

I got to know about shred yesterday. I want to know the proper way of removing files with it. Should I first shred the file and then use rm to remove it? $shred <file> $rm <file> Or ...
Wade Wayne's user avatar
13 votes
5 answers
51k views

Filling my hard drive with zeros

I m looking for best and fastest way to remove all my data From hard drive. I M on linux Of you know something with doing this operation on a USB stick share with me. Other ways are also acceptable ...
Prince JohNy Freemason's user avatar
0 votes
0 answers
269 views

replace remove command (in Linux - overall) with shred

short question: as the title suggests, a system-wide shred instead of the command rm Long question: I know about the "replace" command, as well as I could just to rm = shred (or something on ...
Jane's user avatar
  • 174
11 votes
1 answer
1k views

Using ddrescue to shred only rescued portions of disk

Magnetic drive has failed. I used ddrescue to recover ~85% of it, with a map file, but the rest is borked and continuing to scrub it would take years. I can return it for a replacement. I'd like to ...
endolith's user avatar
  • 314
0 votes
0 answers
461 views

How to mount a usb harddisk after a interrupted shred

Shred command was interrupted by a unrelated and user induced system halt. Now I'm not able to see the harddisk using lsblk -l. Tried on multiple linux systems. This answer (from External HDD detected,...
jjk's user avatar
  • 445
0 votes
1 answer
874 views

Why is shred's -z option twice as slow?

I'm using shred to wipe a partition, and did some speed testing. My results were, in seconds: 6.4 using /dev/zero as the data source 6.5 shred's default raondom implementation 12.9 using shred's `...
Keith Bennett's user avatar
39 votes
5 answers
42k views

Is shred bad for erasing SSDs?

Whenever I sold a drive I've zeroed it once with shred from a live environment: sudo shred -vzn 0 /dev/sdX Before I double-checked it wasn't mounted. This is the fastest way to securely erase a drive ...
H3R3T1K's user avatar
  • 517

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