How to run app with root privilege without password in Ubuntu

Sometimes, there is a need to launch an app with a root privilege. For example, VMware requires the root privilege when it needs to use a physical hard drive. Also, Sublime, for example, needs to be opened with the root privilege when we need to modify a file written as a root.

We can launch them from a terminal with sudo, but it is inconvenient when we work with GUI.

Here, we specify the app to be always opened with the root privilege:

$ sudo visudo

add following line:

[USERNAME] ALL = NOPASSWD: [/path/to/app]