This describes setting up ssh keys and configuration to avoid having to use your NetID+ 2-factor authentication every time you log into the HPC. Windows users will need to install a free Unix-like environment that provides a terminal so as to avoid using an ssh client like Putty (for example: Cygwin (http://www.cygwin.com)). Cygwin users must be sure to install the 'ssh' tools which are not installed by default.