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I'm running an Ubuntu 20.04 instance in Compute Engine providing SSH access through OS Login.

User has set Compute OS Admin Login role and can run commands via sudo without specifying a password. Is there any way to change this? I would like sudo ask for user password.

I have changed all ALL=(ALL) NOPASSWD:ALL occurrences by ALL=(ALL) ALL in /etc/sudoers.d/* and /var/google-sudoers.d/username_domain_ext files without success.

Any ideas?

If I comment #includedir /var/google-sudoers.d in /etc/sudoers.d/google-oslogin users lose privileges to run sudo. That leads me to think they must be something to do with /var/google-sudoers.d/username_domain_ext file to force sudo ask for a password.

Finally, sudo -l seems to return what I want:

username_domain_ext@hostname:~$ sudo -l
Matching Defaults entries for username_domain_ext on hostname:
    env_reset, mail_badpass, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin

User username_domain_ext may run the following commands on hostname:
    (ALL : ALL) ALL

Thanks in advance.

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    • It is my understanding that there are no passwords (OS Login uses SSH keys). Are you setting user passwords on the instance somehow?
    • Thanks for your comment. It has made me see the light. Although it is a Google Identity user with a password, it does not seem to work within the Compute instance. Trying to change password from shell throws this error: passwd: Authentication token manipulation error and passwd: password unchanged

Here is the link of how to set sudo to prompt for password. You need to use the sudo visudo command

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