kazulog@sv1:~$ echo 'taro ALL=(ALL) NOPASSWD:ALL' | sudo EDITOR=tee visudo -f /etc/sudoers.d/taro
taro ALL=(ALL) NOPASSWD:ALL

kazulog@sv1:~$ sudo visudo -c
/etc/sudoers: parsed OK
kazulog@sv1:~$ sudo ls -l /etc/sudoers.d/
total 12
-r--r----- 1 root root 141 Sep 10 13:30 90-cloud-init-users
-r--r----- 1 root root 863 Jan 15  2026 README
-rw-r----- 1 root root  28 Sep 10 13:31 taro
kazulog@sv1:~$ sudo cat /etc/sudoers.d/taro
taro ALL=(ALL) NOPASSWD:ALL
kazulog@sv1:~$ su - taro
Password: 
taro@sv1:~$ sudo -l
User taro may run the following commands on sv1:
    (ALL) NOPASSWD: ALL
taro@sv1:~$ sudo whoami
root
taro@sv1:~$ exit
logout