This will create two files id_rsa (private key) and id_rsa.pub (public key). The private key should be kept secure on your local machine while the public key can be shared with other systems to allow for passwordless authentication via SSH.
2. Copy the contents of the public key file (id_rsa.pub) using cat command or by opening it in a text editor and copying its contents.
3. Log into each remote system that you want to add this key to, and run ssh-copy-id command followed by the username and IP address/hostname of the target machine. This will automatically append your public key (from step 2) to their authorized_keys file in ~/.ssh directory on the remote server.
4. Restart SSH service using systemctl restart sshd or /etc/init.d/ssh restart command to apply changes immediately, or reboot the machine for a full system refresh.
5. Test your new configuration by attempting to connect via SSH without entering a password (if configured correctly). If successful, you should be automatically logged in using your private key instead of having to enter a password each time.
In terms of Kali Linux specifically, here are some additional steps that may be helpful:
1. Install the necessary dependencies for building and compiling SSH keys on Kali Linux by running sudo apt-get install ssh build-essential openssl in your terminal.
2. Generate a new SSH key pair using the following command: ssh-keygen -t rsa -b 4096
3. Copy the contents of the public key file (id_rsa.pub) to each remote system that you want to add this key to, and append it to their authorized_keys file in ~/.ssh directory on the remote server using ssh-copy-id command followed by the username and IP address/hostname of the target machine.
4. Restart SSH service using systemctl restart sshd or /etc/init.d/ssh restart command to apply changes immediately, or reboot the machine for a full system refresh.
5. Test your new configuration by attempting to connect via SSH without entering a password (if configured correctly). If successful, you should be automatically logged in using your private key instead of having to enter a password each time.