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ssh is an executable program that runs on your local computer and allows you to connect securely to a remote computer. We're going to use ssh to access the stampede2 lonestar6 compute cluster at TACC, where the remote host name is stampede2ls6.tacc.utexas.edu.

• On Macs or Linux, you run ssh from a Terminal window

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• On Windows 10 or later, ssh is available in Command Prompt or PowerShell.
  • If your Windows does not have ssh, use PuTTY instead.
• If you have the Windows subsystem for Linux installed, double-click on the icon for the Linux distribution you installed (e.g. Ubuntu).

In your local Terminal window:

ssh <your_TACC_userID>@stampede2userID>@ls6.tacc.utexas.edu

• Answer yes to the SSH security question prompt
• Enter the password associated with your TACC account
• Wait for your 2-factor authentication code to arrive via SMS or app, then type it in

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• Double-click the Putty icon
• In the PuTTY Configuration window
  • make sure the Connection type is SSH
  • enter stampede2.tacc.utexas.edu for Host Name
    • Optional: to save this configuration for further use:
      • Enter stampede2 into the Saved Sessions text box, then click Save
      • Next time select the stampede2 from the Saved Sessions list and click Load.
  • click Open button
  • answer Yes to the SSH security question
• In the PuTTY terminal
  • enter your TACC user id after the "login as:" prompt, then Enter
  • enter the password associated with your TACC account
  • provide your 2-factor authentication code

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