Move Everything to Nothing

mv ~ /dev/null

The functionality of this command is
very simple. When this command is
executed, it moves all the contents in
your home folder (~) into the folder
named /dev/null . Well, that looks harmless right! The problem here is that there is no folder with the
name “Null,” which means it moves
all your files and folders into
nothingness making it impossible to
recovery.
Format Hard Drive

mkfs.ext3 /dev/sda

This is a very dangerous command.
This command cleans off your Hard
drive completely and replaces it with
the new ext3 file system. Once
executed this command kills all your
data irrecoverably. Never try to
execute this command and be careful
while executing commands which
operate on hard drive (sda)
Deletes Everything Recursively

rm -rf /

This is one of the most famous and
deadly Linux commands around.
What this command does is really
simple. It forcefully deletes or
removes (rm ) all the folders and files
recursively (-rf ) in the root directory
(/) of your Linux PC. There is no
possible way for you to boot into your
Linux system again, once you delete
all the files in the root directory.
Moreover the command comes in
many other forms like rm -rf
or rm -rf * . Be very cautious
when you are executing a command
which has rm in it.
Fork Bomb

:(){ :|: & };:

I know what’s going on in our mind
after seeing the command ” That
doesn’t even look like a
command”. This weird looking
command functions like a virus which
creates copies of itself endlessly,
hence it is called Fork Bomb. This shell
function quickly eats all your PC
resources like RAM, CPU, etc. and will
cause a system crash. The crash may
inevitably lead to data loss. So be
careful and don’t ever try to mess with this command.
Output Command Directly to Hard
Drive

any-command > /dev/sda

After coming from a weird command
this one looks simple and actually is
simple. Any command that is
executed in the place of “any-
command” will write the output data
to your first hard drive replacing all
the files and folders. This in turn
damages your entire file system. Once
you execute this command, you will
be unable to boot into your Linux
machine and your data may be lost
irrecoverably. Again, don’t ever try any suspicious command that includes your hard drive (sda).

Comment your opinions below.

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