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Krystian
Asked: 2018-01-11 01:25:52 +0800 CST

How to configure SSHD on CoreOS after installation?

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I've got the CoreOS running and I would like to remove the ability to login using passwords to the sshd. I went through the docs of the CoreOS in here, but I am quite new to the systemd. I went through the man page, but I am a bit lost on it. I know I have to create a dropin file inside /etc/system.d/system/, but I have no idea, in which section of the file, should I put the PasswordAuthentication no option. Since I work remotely, I don't want to screw up and not be able to login again...

I would be grateful for some guidance.

ssh

2 Answers

  1. Best Answer

    After having a chat on #coreos on freenode, I have learned the simples thing of all.

    /etc is not read only, but sshd_config is a symlink to a file on /usr which is. I just had to remove the symlink and create the file by hand... eh.

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  2. You have to edit the file /etc/ssh/sshd_config, you will find PasswordAuthentication there. Then restart the SSHD with systemctl restart sshd

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