Commands for the wicked

!whatever will search your command history and execute the first command that matches 'whatever'. If you don't feel safe doing this put :p on the end to print without executing. Recommended when running as superuser.

This will launch a listener on the machine that will wait for a connection on port 1234. When you connect from a remote machine with something like :

nc 192.168.0.1 1234

You will have console access to the machine through bash.

Cracking a password protected .rar file in a line, by dictionary attack method. All you need is a good dictionary (dict.txt).

There's no need to be logged in facebook. I could do more JSON filtering but you get the idea...

Replace u=4 (Mark Zuckerberg, Facebook creator) with desired uid.

Hidden or not hidden... Scary, don't you?

There are several other options. This one is plain and simple.

Another option is:

nmap -sP 192.168.0.0/24

My netcat (nc-1.84-10.fc6) doesn't have the -e option, so I have to do it like this. Of course, instead of bash, you can use any executable, including scripts.

This will completely erase everything on your hard drive and is not reversible.

This is a simple BASH script which with gather basic system hardware such as CPU sockets and cores, Memory modules and sizes as well as overall memory and more.

Root access may be needed to pull information from 'dmidecode'

this is the most scary command that exists. read the hdparm man page. and see this post: http://dazzle.cs.mcgill.ca/wordpress/?p=36

Use "killall bash" to stop it.

WARNING!! This command can produce to crash the unix system where you execute it. What this command do is to generate a lot of threads (so in practice -> process) until the system is overloaded, and to recover it, it is needed a reboot of the machine.

I believe it is interesting to study how this command works, however It is important to notice that executing this, the system is going to crash, so PLEASE save all the work you have opened before. Maybe it can also corrupt the system...

This is a fork bomb.

More info: http://en.wikipedia.org/wiki/Fork_bomb

exponentially spawns subprocesses until your box locks up.

DO NOT USE IF YOU DON'T WANT TO REBOOT!

Classic BASH fork bomb. DO NOT USE!

Better don't run this command. Only funny on machines you'd like to kill.

creates a large number of processes very quickly in order to overload an OS

to stop this bomb in about 45 sec.

Type: while (sleep 100 &!) do; done

or do a killall

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