See the manpage, either via man ssh_config on your own machine which will contain the most appropriate version, or you can view it online from OpenBSD's Site. I use this file to control tunnels I always use, the private key needed for the connection, the username (if it differs from my local username), etc. ssh and enter it.Ĭonfig is the file name, it is a plain text file with configuration parameters. If you're in Terminal and in your home directory, you can simply run cd. ~, your home directory, it expands on my system to /Users/jason. This file doesn't exist by default (per the comments on the question), but should be written at ~/.ssh/config. The SSH client allows you to store an amazing amount of properties based on a given hostname, even global defaults, in the 'ssh_config' client file. On Linux, OS X, and most other UNIX-y based environments, SSH is generally purely command line, but still amazingly powerful. PuTTY is a great Windows frontend, not to mention the need for an SSH client in the first place.