exu/wiki-grav
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add command for overwriting harddisks

Browse Source
This commit is contained in:
RealStickman 2022-10-18 20:43:26 +02:00
parent 2dbb6558a5
commit 17e783a5b1
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
pages/04.other/16.useful-commands/default.en.md
View File

@ -18,3 +18,11 @@ Using find with its `exec` switch one can set different permissions based on the
One example would be only changing file or directory permissions. One example would be only changing file or directory permissions.
`$ find (directory) -type f -exec chmod 744 {} +` `$ find (directory) -type f -exec chmod 744 {} +`
Replacing `-type f` with `-type d` would execute the `chmod` for directories instead. Replacing `-type f` with `-type d` would execute the `chmod` for directories instead.
## Various
### Overwrite disk with pseudorandom data
Using openssl on CPUs with AES acceleration one can create pseudorandom data with high speeds.
Much faster than `/dev/urandom` at least
`# openssl enc -aes-128-ctr -md sha512 -pbkdf2 -nosalt -pass file:/dev/urandom < /dev/zero | pv > (target disk)`
Around 2GiB/s on my Ryzen 7 1700x if output to `/dev/null`