ssh no password

To enable passwordless SSH access to a remote machine, you can manually copy your public SSH key into the ~/.ssh/authorized_keys file for the user you want to connect as.

Steps

1. Generate an SSH key (if you haven't already):

   ssh-keygen

   This will create two files in ~/.ssh/:
   - id_rsa (private key)
   - id_rsa.pub (public key)
2. Copy your public key to the remote machine:

   You can do this manually using the following command:

   cat ~/.ssh/id_rsa.pub | ssh user@host "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

   Replace user with the remote username and host with the IP address or domain name of the server.
3. Test the connection:

   ssh user@host

   If everything is set up correctly, you should connect without being prompted for a password.

Notes

• Make sure the ~/.ssh directory and authorized_keys file on the remote machine have the correct permissions.
• This method requires that you can still log in to the remote machine using a password at least once to add your key.
• Your private key (id_rsa) must stay secure and should never be shared.