5 DEADLY LINUX COMMANDS

Linux today is well known and well reputed one of the most powerful operating system. Linux user can perform numerous such tasks that a windows or Mac user can’t even imagine.

Sometimes Linux can go extreme upto the extent that it can do serious damage to the system.Linux system dont even ask user for confirmation once the command is given and simply performs its task.hardware of your computer within a few seconds. Because of these harmful activities of linux it is recommended to use it only if you are good at giving commands and have in depth  knowledge of linux commands.

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5 Deadly linux commands that can Destroy one’s System

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1. Command > rm -rf / = It will Delete Everything




Explanation : It is a combination of three keywords.


First is : rm It will remove all the files followed by this command.
Second is : -rf This will run rm command in more effective way and will remove everything ( all files and folders inside the specified folder )without asking confirmation from the user.
Third is : / This will start removing the data from the root directroy and will delete everything from the computer including the data of removable media.

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2. Command > :(){ :|: & };: = Shell function that gets repliacated.
This command creates a shell function , which once get initialized starts to create multiple copies of itself.It results in taking quickly all the memory and power of CPU.It makes computer freeze or not responding. This is also known as Denial Of Service Attack.

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3. Command > mkfs.ext4 /dev/sda1 = This command will format the hard disk.



Explanation : This command is again composed of two keywords.
First is : mkfs.ext4 : This part of command will create a new ext4 file system on following device where this command will get executed.



Second is : /dev/sda1 ;This part of command specifies the 1st partition on the first hard disk which is probably in use by the user. Similarly, This Command > mkfs.ext3 /dev/sdb2 will Format the second partition on the second hard disk with ext3 File system.

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4. Command > /dev/sda – Write Any content Directly to a Hard Drive.



Explanation : This command will execute normally as other commands in linux do. But output of this command will directly be sent to the file system (NTFS or FAT ) of the Hard Drive. It will result into damaging the file system of the computer.

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5. Command > mv ~ /dev/null – Beware it Will Move your Home Directory To Black hole.



Explanation : Moving any of your content and data to following path : /dev/null means you want to destroy it.
It means /dev/null is a black hole where once anything sent , can not be recovered back.

Note:- Many of these commands will only be dangerous if they’re prefixed with sudo on Ubuntu – they won’t work otherwise. On other Linux distributions, most commands must be run as root.

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Computer Security Tips to Protect your System information

We hear a lots and lots of concerning cases of hacking, softwares, malwares, viruses, etc, Here are some Computer Security tips to safeguard your PC/laptop against hacker intrusions, malware and different viruses that exploits your PC or Laptops.

1) Use a firewall:-

A firewall is a software system that will handle outgoing and incoming Internet connections of your computer. You’ll be able to clearly use the one engineered into Windows by default, however this can be by no means the foremost Efficient. i will like to recommend Comodo Firewall which is free and straightforward to use. Using Firewall is just one of Computer Security tip that i want to mention.

2) Use antivirus:-

There are obvious reasons to use Anti virus Programs, but there are People that don’t have any antivirus or those who have, they have not upgraded thier antivirus since their permit has lapsed.. However there are quite powerful free antivirus Available. One must Install Antivirus to Protect and Keep thier Computer Secure.

3) Updating software system:-

New vulnerabilities are found in software system or operative systems like Windows each day. So one must always updates thier software system. Keeping your installed Softwares upto date is Important, as it will Keep hackers away from breaking into your System and its Said that any upto date program Works smooth without any glitch.

4) Use complicated passwords:-

Users like you and me use too weak  passwords that are very simple to detect for hackers, there are so many software which will try all Possible Combinations to Crack your Password, this is known as Bruteforce technique .  If your secret word(password) Consists of just 4 or 5 characters, it will easily discover it.Your Password becomes harder to crack if it consists of 8 or 9 characters which also includes numbers, letters and special characters.To check the strength of your Password, there are plenty tools over internet. This is an important Computer Security tip that everyone must Consider.

 

5) Use totally different passwords:-

Most common mistake people make is that they use same password everywhere over internet. Yes, its very hard to remember passwords for all accounts but its highly advisible to have different passwords for different accounts.This Practice Comes handy if one of your account gets Compromised/Hacked, then your other accounts are still safe.

 

6) Always Beware:-

 

• Finally, Abstain from getting hacked,  Always beware while Browsing Internet, don’t transfer and install everything and anything on your PC or Laptop.

• Always check the sources of software system and websites that you just use to download programs.

• Don’t be silly and amateur hackers won’t be able to do  anything to you (while serious and skilled hackers will not have any interest to hack you)

Do you have any Computer Security tip that you will like to share ? Feel free to comment below.

Hey !!!!! Any Problem for using this trick , then Watch the video.