Andrew Severin

Andrew Severin

Andrew manages the Genome Informatics Facility at Iowa State University. His academic background is in biochemistry with a Ph.D. in Biophysics/NMR spectroscopy. He is an interdisciplinary scientist working at the interface of Genetics and Bioinformatics, translating Big Data into informative data for interesting biological questions. He is passionate about evolution and the science behind the genome.

DataScience Workbook / 06: High-Performance Computing (HPC) / 2. Remote Access to HPC resources / 2.2. Secure Shell Connection (SSH)

Introduction

What is ssh?

  • SSH is short for Secure SHell

ssh (SSH client) is a program for logging into a remote machine and for executing commands on a remote machine. It is intended to provide secure encrypted communications between two untrusted hosts over an insecure network. X11 connections, arbitrary TCP ports and UNIX-domain sockets can also be forwarded over the secure channel.

On a Mac (OS)

  1. Use the Finder and search for and open the Terminal program .

  2. Type ssh username@hostname
    • Example1: ssh andrew.severin@login.scinet.science
    • Example2: ssh severin@bridges.psc.edu
  3. Hit by (return) key and enter your password and verification code.
    ^ Note: as you type the password, you will not see your typing.

On a PC (Windows)

On Windows, it will be easier for you to login first to a linux based system for the rest of this tutorial (remote machine). You will first need to open up the command prompt which is similar to a terminal in the Mac OS operating system.

approach 1 approach 2

Press (windows key) + ; type cmd and click .

Search for cmd using Window’s search.

In the terminal window that appears, type:

ssh usename@hostname

providing the credentials for your user:

  • Example1: ssh andrew.severin@login.scinet.science
  • Example2: ssh severin@bridges.psc.edu

Hit by (Enter) key and enter your password and verification code.
^ Note: as you type the password, you will not see your typing.

The window can be resized with the mouse and the font text can be increased by pressing cmd + or control + on Mac or Windows, respectively.