How to run sudo command without a password on a Linux or Unix

Disclaimer:
All the content shown in the video are only for the educational
purpose. The tutorial doesn't promote any no ethical activities, it is
only for the education and knowledge. Please don't use the steps
shown in the video for any non ethical purpose. Ask the user
permission to perform any kind of penetration testing.
Thank You.
In case you are running Linux on a machine that you normally use alone, say on a laptop, entering a password each time you invoke sudo can become so boring in the long run. or sometime you have a script file containing many sudo commands and you don't want to entering password each time. Therefore, in this video, we will describe how to configure sudo command to run without entering a password.