After you download the PuTTY installer and optionally run an MD5 hash check, run the installer in order to install on your local computer all the PuTTY applications in the package. Next, you need to add the private SSH key. That's done from the Pageant application (the icon looks like a computer with a hat on it).SH (Secure Shell) is a network protocol through which you can access your hosting account and execute commands, transfer files, etc using a secure connection. Windows users can establish an SSH connection from their local computer to the server hosting their account with an application called PuTTY.