sudoers NOPASSWD: sudo: no tty present and no askpass program specified

Question

I have added a user like this:

$ adduser --system --home /no/home --no-create-home --group --disabled-password --disabled-login testuser

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Answer 1

I fixed it by login to the server and append the following lines to the ssh-server configuration:

> vim /etc/ssh/sshd_config

Match User 
    PermitTTY yes

So I don't need the -t options permanently.