Hacking the password of Ubuntu

If you've ever forgotten your password, you aren't alone it's probably one of the most common tech support problems I've encountered over the years.Luckily if you are using Ubuntu they made it incredibly easy to reset your password.
All it takes is adjusting the boot parameters slightly and typing a command or two, but we'll walk you through it.


Resetting your Ubuntu Password

Reboot your computer, and then as soon as you see the GRUB Loading screen,
make sure to hit the ESC key so that you can get to the menu.


Root Shell Method

Here we are going to manually edit the grub options to allow for a root shell. First you want to make sure to choose the regular boot kernel that you use (typically just the default one), and then use the "e" key to choose to edit that boot option.

Now just hit the down arrow key over to the "kernel" option, and then use the "e" key to switch to edit mode for the kernel option.

You'll be presented with a screen that looks very similar to this one:

Remove the "ro quiet splash" part with the backspace key, and then add
this onto the end:

rw init=/bin/bash

Once you hit enter after adjusting the kernel line, you'll need to use the B key to choose to boot with that option.




At this point the system should boot up very quickly to a command prompt.



Changing the Actual Password
You can use the following command to reset your password:

passwd

For example my username being user I used this command:

passwd user


After changing your password, use the following commands to reboot

your system. (The sync command makes sure to write out data to the

disk before rebooting).



sync
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reboot -f


The -f parameter is necessary to get the reboot

command to work for some reason. You could always hardware

reset instead, but make sure to use the sync command first.

And now you should be able to login without any issues
This is taken from my senior Mr.Jinthu jacob.. thanks for the info