1, add the security group rules
2, using GitHub, then there will be a local id_rsa.pub (public key), id_rsa (private), typically stored in the C drive .ssh user directory files.
Copy the contents down the public key (ssh-rsa ....)
3, run git bash
Enter the command: ssh root @ public IP address
Follow the prompts to enter your password
Enter the command: cd /root/.ssh
Enter the command: vim authorized_keys
If there had been content, and on a separate line, paste the copy of the public key front
If no content, then paste it directly into
: Wq to save and exit
Enter the command: exit off the remote connection
Enter the command: ssh root @ public IP address, this time you will find the need to lose a password can connect your Linux servers up.