> I would put it in /etc/sudoers, myself.
>
It's not recommended to modify /etc/sudoers because it can be overwritten/reset during a next upgrade.
Best is to have a file inside /etc/sudoers.d.
Be sure to have the following instruction in your /etc/sudoers:
#includedir /etc/sudoers.d
NB: this is not a comment but a real/active instruction ;)
I have to create a file in /etc/sudoers.d and not use the file /etc/sudoers.d/10-installer? And what should I name the file?
(I edited the 10-installer file with the line kaye ALL=(ALL) NOPASSWD: /usr/local/bin/backlight-brightness but it doesn't have any effect; in fact I think sudo was rendered useless to me, as in I cannot execute sudo, it said something like an error in line something)
#includedir /etc/sudoers.d is not a comment? that's weird but thanks for the tip!