![]() Why do you want to set up SSH authentication without a key or password? Have these instructions helped you achieve your goal? Let us know in the comments below. Did you know you can add a single key on more than one remote server? Additionally, you can remove SSH authentication with a password and improve your server security in the process. Now you know how to set up SSH authentication using a key without any user password for remote server login. We must have password-based authentication enabled to use this method. It’s included in the OpenSSH packages in most Linux distributions, so we don’t need to install it. It’s the easiest and most recommended method for copying a public key. ![]() ![]() On Fedora or CentOS servers, use this command: ssh-copy-id is a utility to copy the public key to a remote SSH server. You can restart it with this command on Debian and Ubuntu servers: When you are finished, save this file and reboot the Secure Shell service. You need to enter the Secure Shell config file /etc/ssh/sshd_config, and try to find these directives, changing them exactly like this: Using SSH keys, log in to the remote server. Propagating the public key to a remote system If password authentication is currently enabled, then the easiest way to transfer the public key to the remote host is with the ssh-copy-id command. Actually, prior to this step, you need to ensure you have server access without a password and that your user has sudo privileges. Don’t confuse this with your server’s login password. Remove the SSH Authenticationįor added security, you could remove SSH authentication via password. You should get an instant login if you did everything right. $ cat ~/.ssh/id_rsa.pub | ssh _ip_address “mkdir -p ~/.ssh & chmod 700 ~/.ssh & cat > ~/.ssh/authorized_keys & chmod 600 ~/.ssh/authorized_keys” Logging In Without a Passwordįinally, you are ready to log in to your server, and you won’t need a key or password for it. Just in case you can’t use the ssh-copy-id utility on your PC, use this command to copy the public key: When you get authentication, the remote user file (authorized_keys) will get the public key appended. You will then get a message telling you to type in the remote_username password: ![]()
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