AWS Ubuntu using public/private key ssh, trying to start a deamon asks for password

user3248578

11/6/22, 8:08 AM

I set up a new Ubuntu machine on AWS using public/private key as authentication without a password protecting the key (it was generated by the AWS console). I copied the key to my local machine and I am able to login to the remote machine successfully using ssh.

Problem: I am trying to run docker on the remote machine using

systemctl start docker

and I get asked for a password:

Authentication is required to start 'docker.service'. Authenticating as: Ubuntu (ubuntu)

I did not setup any password, how can I tell the shell to use my key instead?

1 + 1

ssh

authentication

Nate T

11/6/22, 10:51 AM

It is probably the key ring or the login manager. Different passwords. did it come with the container? Regarding the message, I've never ran it inside a docker container. Not sure how it is set up. Id check the info on dockerhub, or wherever you got it.

Score:4

Ubuntu

matigo

11/6/22, 8:17 AM

Generally you need to perform Docker commands with sudo. Try this:

sudo service docker start

If you would like the default user account to perform Docker commands without sudo, then you'll need to add ubuntu to the docker group:

sudo usermod -a -G docker ubuntu

You can then test the permissions with something like:

docker info

If you get a permissions issue, you may need to disconnect from the EC2 instance, then reconnect.

0 + 1

user3248578

11/6/22, 10:39 AM

Thank you @matigo for a complete answer.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: AWS Ubuntu using public/private key ssh, trying to start a deamon asks for password

TH: AWS Ubuntu ใช้คีย์สาธารณะ/ส่วนตัว ssh พยายามเริ่มให้ปีศาจถามรหัสผ่าน

RO: AWS Ubuntu utilizând cheia publică/privată ssh, încercând să pornească un deamon cere parola

RU: AWS Ubuntu с использованием открытого/закрытого ключа ssh, пытаясь запустить демона, запрашивает пароль

VI: AWS Ubuntu sử dụng ssh khóa công khai/riêng tư, cố gắng khởi động một deamon yêu cầu mật khẩu

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