How to Disable Password for sudo Command

Edit visudo file:

sudo visudo

To run the poweroff command as the user username add the following line:

username ALL=(ALL) NOPASSWD: /sbin/poweroff, /sbin/reboot, /sbin/shutdown

See also

• How to Configure SSH Authentication With No Password on VirtualBox VM
• Command to Copy File to Remote Server With scp
• Install new version of Python and virtualenv using that version on Ubuntu
• Install psycopg2 package in python
• Fix git loose object corrupt