duo-ssh-faq.md
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+# Duo FAQ
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+
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+## how to setup two factor?
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+You'll need to register your device with Duo to recieve security codes, and can receive these codes by phone call, text message, or Duomobile app.
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+
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+
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+``
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+ssh $username@duo-test.sbgrid.org
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+Password: [input password]
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+Please enroll at $url
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+``
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+
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+Copy the url into a web browser, and follow the prompts to register.
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+Please contact us at help@sbgrid.org if you encounter problems.
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+
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+## Configuring Options in SSH configuration
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+Set `DUO_PASSCODE` environmental variable to `push` (Duo mobile app), `call` (SMS) or `phone` (phone call) in `~/.bashrc`, `~/.cshrc`, or `~/.zshrc`.
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+
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+``
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+Host xtal200
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+ Hostname xtal200.harvard.edu
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+ SendEnv DUO_PASSCODE
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+``
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+
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+## Examples
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+
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+### ssh
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+
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+*todo*
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+
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+### scp/rsync/sftp
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+
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+*todo*
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+
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+