ssh permissions
DENIED

https://askubuntu.com/questions/311558/ssh-permission-denied-publickey

 

PubKeyAuthentication

Set up your client

  1. Generate your key.

    ssh-keygen
    
  2. Configure ssh to use the key.

    vim ~/.ssh/config
    

    Your config file should have something similar to the following:

    Host SERVERNAME
    Hostname ip-or-domain-of-server
    User USERNAME
    PubKeyAuthentication yes
    IdentityFile ./path/to/key
    

    You can add IdentitiesOnly yes to ensure ssh uses the specified IdentityFile and no other keyfiles during authentication. Setting IdentitiesOnly prevents failed authentications from occurring, when ssh would otherwise attempt to login with multiple keys. Setting this is also considered more secure, as you're not leaking information about other keys you have installed, and maintaining separation of your keys between different levels of access.

  3. Copy your key to your server.

    ssh-copy-id -i /path/to/key.pub SERVERNAME`
    

    For example, ssh-copy-id -i ~/.ssh/id_res.pub -p 22 user@1.1.1.1

Troubleshooting

  1. use "-vvv" option

  2. Make sure the server has your PUBLIC key (.pub).

  3. Make sure your IdentiyFile points to your PRIVATE key.

  4. Make sure your

    .ssh
    

    directory has 700 and the files within are 600 permissions.

    • ssh-keygen will create files and directories for you with the proper permissions
  5. tail -f /var/log/auth.log (on the server) and monitor errors when you attempt to login

  6. If you have many key files, try IdentitiesOnly yes to limit the authentication to use the single, specified key.

 

Share

Improve this answer

Follow

edited Apr 2, 2022 at 2:20

matigo's user avatar

matigo

20.6k77 gold badges4444 silver badges7171 bronze badges

answered Jun 23, 2013 at 21:04

earthmeLon's user avatar

earthmeLon

11.1k11 gold badge3636 silver badges6060 bronze badges

Scroll to Top