Why NOPASSWD in visudo on Linux Mint 18 does not work

This is a sudoers file which I have on a **Debian 9** server and it **works**. /etc/sudoers contains: Defaults env_reset Defaults mail_badpass Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" # Host alias specification # User alias specification # Cmnd alias specification # User privilege specification root ALL=(ALL:ALL) ALL # the following line I've added for sudo to work on Debian, which by default does not vlastimil ALL=(ALL:ALL) ALL # and this line I've added just now, so I could enable / disable teamviewer daemon as I wish vlastimil ALL = (root) NOPASSWD: /usr/bin/teamviewer # Allow members of group sudo to execute any command %sudo ALL=(ALL:ALL) ALL # See sudoers(5) for more information on "#include" directives: #includedir /etc/sudoers.d Meaning I can now run e.g. the following without entering password: sudo teamviewer daemon disable sudo teamviewer daemon enable This, however, is a **non-working** sudoers file on **Linux Mint 18** in a sense, it still asks me for password. /etc/sudoers contains: Defaults env_reset Defaults mail_badpass Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin" # Host alias specification # User alias specification # Cmnd alias specification # User privilege specification root ALL=(ALL:ALL) ALL # this line I've added myself, because I felt it is needed, however user vlastimil has had sudo access all the time, added just now vlastimil ALL=(ALL:ALL) ALL # and this line I've added just now, so I could enable / disable teamviewer daemon as I wish, but it does not work vlastimil ALL = (root) NOPASSWD: /usr/bin/teamviewer # Members of the admin group may gain root privileges %admin ALL=(ALL) ALL # Allow members of group sudo to execute any command %sudo ALL=(ALL:ALL) ALL # See sudoers(5) for more information on "#include" directives: #includedir /etc/sudoers.d I guess there is some difference between Debian and Mint, which makes the added lines non-working. I read different answers like on this page: https://unix.stackexchange.com/questions/18830/how-to-run-a-specific-program-as-root-without-a-password-prompt But I am not clever from it. **EDIT1:** The first answer gives on Linux Mint a strange error: $ sudo /usr/bin/teamviewer Init... *** TeamViewer can not be executed with sudo! *** Either use your normal user account without sudo or use a the real root account to log in to your desktop (not recommended!). I don't get this either. ------------------------------------ $ which teamviewer /usr/bin/teamviewer $ file /usr/bin/teamviewer /usr/bin/teamviewer: symbolic link to /opt/teamviewer/tv_bin/script/teamviewer $ file /opt/teamviewer/tv_bin/script/teamviewer /opt/teamviewer/tv_bin/script/teamviewer: Bourne-Again shell script, ASCII text executable $ cat /opt/teamviewer/tv_bin/script/teamviewer #!/bin/bash # If you see this message, you probably attempted to start TeamViewer. # Please open a terminal (Konsole, gnome-terminal, xterm), # navigate to this folder (type 'cd /path/to/teamviewer' [Enter]) # then execute TeamViewer (type './teamviewer' [Enter]) TV_SCRIPT_DIR="$(dirname "$(readlink -e "$0")")" source "$TV_SCRIPT_DIR/tvw_main" Main "$@" **EDIT2:** For instance on AskUbuntu, as suggested in comments: Why is sudoers NOPASSWD option not working? and on many other places, there is a solution where they put the rule **after** admin group rule. I've tried it, even rebooted afterwards, but it's still not working.