SUDO WITHOUT PASSWORD ON UBUNTU

I am sure you will agree with me that every time we enter "sudo" we are prompted with password request! Well, we can get around it this way:
Open the terminal and type :
tr45h@ubuntu:~$ sudo visudo

Add the following line to the END of the file:
<username> ALL=NOPASSWD: ALL

Replace <username> with your user name (without the <>).

Example:
cr45h ALL=NOPASSWD: ALL

Hit Ctrl + o + Enter to confirm, and Ctrl + x to save and exit.

That's it from now on, everytime you type "sudo", you wont be prompted for password!