Tuesday, 4 February 2014

How to Crack the Password of Root and Add Users in Linux


When you start the Linux Operating System, a screen will appear as shown below:




On this screen press e to edit commands before booting.
Hitting e will take you to the following screen. Here you have to make sure that kernel is highlighted, press up and down arrows keys to navigate through the menu and highlight the kernel mode and when the kernel mode is highlighted press e again.



It will take you to the following screen. On this screen just type single as shown below.



This will again take you to the previous screen where you pressed e but this time you have to press b in order to boot.



Now hitting ‘b’ will take you the following screen, on this screen first to crack the root password type passwd then it will ask you a new password, type a new password and then retype it, after this it will show you the message All authentication tokens updated successfully this means you have successfully changed the password of root.



Now we have to add another user and set a password. In order to accomplish this task we need to know the two commands highlighted below. First type the command useradd and after space type the name you want to give the user just like shown below, I have given the name os, this command will create a user you specified. Now to set a password of the user type passwd and name of the user you want to set a password to, just like highlighted below. This will successfully set a password and will show you a message All authentication tokens update successfully. In the end type init 6 to restart the system.



You can see that a user has been created with the name of os. Click this user and provide the password we set to it.





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