If you get the following error when trying to execute a sudo command, despite the fact that you configured your sudoers or sudoers.d config file properly:
sudo: pam_unix(sudo:auth): conversation failed sudo: pam_unix(sudo:auth): auth could not identify password for [user]
Then, you might need to have a look at the PAM configuration on your device.
Ensure that you have this line enabled in your /etc/pam.d/sudo file:
# cat /etc/pam.d/sudo #%PAM-1.0 # The line below should fix the sudo:auth could not identify password auth sufficient pam_permit.so # The lines below are the default config auth include system-auth account include system-auth password include system-auth session optional pam_keyinit.so revoke session include system-auth
Once you changed this file, no need to restart anything – just retry your command and it should work!