How To Enable Passwordless Sudo For A Specific User in Linux

This can be done is 3 quick steps:

1. Edit sudoers file: sudo nano /etc/sudoers
2. Find a line which contains includedir /etc/sudoers.d
3. Below that line add: username ALL=(ALL) NOPASSWD: ALL , where username is your passwordless sudo username; Save your changes.

You're done. From now on, your user will be able to execute sudo any_command
without providing a sudo password.