SSH config file
Simplifies SSH connection by storing the intricate details surrounding the SSH connection. Fields are optional not required.
# Create a config file
$ vi ~/.ssh/config
Content of config file
Host 104.105.103.102
OR
Host prod-instance
HostName 104.105.103.102
User root
IdentityFile ~/.ssh/id_rsa
Port 22
SSH into the server configured in config file
$ ssh prod-instance
# So much easier!!