Using the .ssh configuration file to save host specific options (~/.ssh/config)....

Using the .ssh configuration file to save host specific options (~/.ssh/config). Never again long ssh commands to connect to your frequently connecting list.

    Host home home.example.com
      HostName home.example.com
      Port 12345
      User dryicerx
      IdentityFile ~/.ssh/somekey.pem
      LocalForward 59001 localhost:5901 
      
    Host *amazonaws*
      User root
      IdentityFile ~/.ssh/yourawskey

now on your command line, and the settings will automatically be applied.

    ssh home  
    ssh 1-2-3-4.blah.amazonaws.something.com

I specially love the last one if you are working with EC2, as it catches any EC2 domain name and applies the key with the root user.