Score:0

Ubuntu

Permission denied (publickey) while copying id

Falio

12/7/22, 12:15 PM

I was trying to copy a key id for password-less SSH access, however it seems that the password authentification is no. I am not sure how to change that.

Here is the original code:

ssh-copy-id xxxx@xxxx

/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/xxxx/.ssh/id_rsa.pub"

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys

xxxx@xxxx: Permission denied (publickey).

126

1 + 2

ssh

user535733

12/7/22, 2:13 PM

The question seems unclear. Are you asking how to properly set up key-based authentication? Are you saying you made a mistake and locked yourself out? Are you asking how to add a key to a system that you do not administer? Or are you asking something else? Take a look at https://askubuntu.com/questions/46930/how-can-i-set-up-password-less-ssh-login for an overview.

Falio

12/7/22, 2:46 PM

Thank you for the link. Yes, it is what I want to do - a password-less SSH. My problem is that it does not allow me to copy the key, and I have googled some solutions and it seems they all point towards setting the password authentification from no to yes in the cofiguration. However, I am not sure how to do that.

Score:0

Ubuntu

user535733

12/7/22, 2:10 PM

You must briefly enable password access in order to use ssh-copy-id, then disable it again.

Reminder: after enabling/disabling password access, you must restart sshd so it reloads the new configuration.

Example:

server$ sudo nano /etc/ssh/sshd_config        # Enable password login
server$ sudo systemctl restart sshd.service   # Restart sshd

client$ ssh-copy-id [email protected]        # Transmit your key
client$ ssh [email protected]                # Test login using key

server$ sudo nano /etc/ssh/sshd_config        # Disable password login
server$ sudo systemctl restart sshd.service   # Restart sshd

0 + 4

Falio

12/7/22, 2:42 PM

Hello, I managed to enter the configuration regarding the first step and changed 'Password Authentification no' to 'yes'. But what command should I type to exit the configuration and return to the normal ubuntu command window?

Falio

12/7/22, 2:48 PM

I see! So the '^' stands for 'Ctrl'? I did see the instructions but they were all in the form of '^X' or '^R', etc.

user535733

12/7/22, 2:52 PM

One example of a How To Use Nano tutorial: https://www.youtube.com/watch?v=Jf0ZJZJ8jlI. There are many Nano tutorials out there.

Falio

12/7/22, 3:21 PM

Thank you! It seems I need to use 'sudo /etc/init.d/ssh restart' instead to restart the ssh, I am not sure why (I am quite new to linux). The rest of them worked perfectly, many thanks!

Elon Musk

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

EN: Permission denied (publickey) while copying id

TH: ปฏิเสธการอนุญาต (คีย์สาธารณะ) ขณะคัดลอกรหัส

RO: Permisiune refuzată (cheie publică) în timpul copierii ID

RU: Разрешение отклонено (publickey) при копировании идентификатора

VI: Quyền bị từ chối (khóa công khai) trong khi sao chép id

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