Originally Posted by Matan

Add the application to sudoers by creating a file called
/etc/sudoers.d/emelfm2.sudoers containing:
user ALL = NOPASSWD: /usr/bin/emelfm2
Then use Exec = /usr/bin/sudo /usr/bin/emelfm2
or Exec = osso-xterm "sudo emelfm2"

Originally Posted by qwerty12

...
For future reference: Use visudo instead of editing sudoers directly. visudo tells you if a line will **** up the entire sudo system when exiting the editor.