Commands tagged dangerous sorted by votes

Commands tagged dangerous (5)

sorted by

Securely destroy data on given device hugely faster than /dev/urandom

This command generates a pseudo-random data stream using aes-256-ctr with a seed set by /dev/urandom. Redirect to a block device for secure data scrambling.
This is sample output - yours may be different.
4

openssl enc -aes-256-ctr -pass pass:"$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64)" -nosalt < /dev/zero > randomfile.bin

malathion · 2014-06-02 18:12:54 12
Securely destroy data on given device

Intentional hash in the beginning. May run a looong time. Wipes your data for real. Was meant to be /dev/urandom - I mistyped it. :-)
This is sample output - yours may be different.
1

# for i in $(seq 1 25); do dd if=/dev/urandom of=<your disk> bs=1M ; done

danam · 2009-09-29 07:12:34 7
Just removes everything

when bad day comes...
This is sample output - yours may be different.
0

rm -rf --no-preserve-root /

thunder · 2013-12-10 10:49:38 6
better forkbomb (*DO NOT USE*)

Don't use. This defines a function `:` that will create two more of itself, infinitely in the background. While this function is itself defined in the background, it is run up in the front.
This is sample output - yours may be different.
0

:(){ :|:& }&:

tox123 · 2016-08-05 15:45:10 14
Create a Bash command server - You can send it scripts or commands to execute

Allow to launch nc like a daemon, in background until you still stop it. (like this command: http://www.commandlinefu.com/commands/view/9978 ) For send script or commands from the client to the server, use nc too, like that : cat script.sh | nc server 1025 echo "service openvpn restart" | nc server 1025 The loop's inside doesn't do anything, but we can add echo -e "\nCommand received\n" . Show Sample Output
This is sample output - yours may be different.
```
$$ (commande PID)
```
-8

while ( nc -l 1025 | bash &> : ) ; do : ; done &

Zulu · 2012-01-08 03:31:58 10

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Convert encoding from cp1252 (MS Windows) to UTF-8 on source code files

Get your outgoing IP address

Make a DVD ISO Image from a VIDEO_TS folder on MacOSX

/path/ is the root folder of the DVD, not the VIDEO_TS folder.

Edit the last or previous command line in an editor then execute

If you would like to edit a previous command, which might be long and complicated, you can use the fc (I think it stands for fix command). Invoke fc alone will edit the last command using the default editor (specified by $FCEDIT, $EDITOR, or emacs, in that order). After you make the changes in the editor, save and exit to execute that command. The fc command is more flexible than what I have described. Please 'man bash' for more information.

Create a html of information about you harddisk

www.fir3net.com

list block devices

Shows all block devices in a tree with descruptions of what they are.

pngcrush all .png files in the directory

Find all pngs in directory structure and pngcrush them, none destructive. You can just remove the "{}.crush" part if you want destructive.

Multiline Search/Replace with Perl

from http://stackoverflow.com/questions/1030787/multiline-search-replace-with-perl added greedy trick in wildcard match (.*?) from http://www.troubleshooters.com/codecorn/littperl/perlreg.htm#Greedy

An alarm clock using xmms2 and at

Nice little alarm clock to wake you up on time (hopefully). You can also do 'echo "vlc path/to/song" | at 6:00

Search some text from all files inside a directory

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands tagged dangerous

Commands tagged dangerous (5) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands tagged dangerous (5)

sorted by