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I have a local Linux VM (ubuntu 14.04 LTS) that I use for development. How can I configure ssh to login without any authentication? Again, it's a local dev VM so there are NO security concerns.

Thanks

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  • Do you truly mean "no authentication" or would no prompting be acceptable? Because for the latter case, I would use ssh keys. Commented Jun 8, 2017 at 4:28

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without any authentication

is not possible in SSH. But there are several alternatives:

  • You can set up empty password and allow using empty passwords in /etc/ssh/sshd_config and PAM configuration (not recommended)

  • You can set up public key authentication using non-encrypted private key:

    ssh-keygen -t rsa -f ~/.ssh/id_rsa -N ""
ssh-copy-id your-server

    And then you will be able to connect "without explicit authentication" (your client will be authorized to access this machine). (recommended)

  • You can modify the openssh to accept any authentication (or the none authentication method, which is against the SSH specification), but I would say it is not worth the effort.

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