Administrator password not working

[jonathon]

Please look here:

Sudo password wrong , even though i am sure its the right password

Hi I am using dragniozed gaming edtion and after few days of using sudo , sudo decide the password i enter all these past days is suddenly wrong password !! [sudo] password for abdulhadikh: Sorry, try again. [sudo] password for abdulhadikh: Sorry, try again. [sudo] password for abdulhadikh: sudo: 3 incorrect password attempts i tried to roll back to old snap and that didnt help me ! I would like to get help to fix it ASAP Thanks

and here:

Don't know su password?

I am super new to linux. This is my first linux Distro. Dual Booting with Windows I am trying to get su in Terminal. It asks for password but says incorrect if i enter the password i logged in with. While installing i didn't created any password for su ( noob ). Please help on how to get this SU password.

and see if either is the same issue.