Skip to content

Home

Jump to bottom
Kevin Chugh, Ph.D, Founder, Main Street Computing (mainstreetcomputing.com) edited this page Dec 9, 2019 · 1 revision
<title>GitHub · Where software is built</title> 
<meta property="og:url" content="https://github.com">
<meta property="og:site_name" content="GitHub">
<meta property="og:title" content="Build software better, together">
<meta property="og:description" content="GitHub is where people build software. More than 40 million people use GitHub to discover, fork, and contribute to over 100 million projects.">
<meta property="og:image" content="https://github.githubassets.com/images/modules/open_graph/github-logo.png">
<meta property="og:image:type" content="image/png">
<meta property="og:image:width" content="1200">
<meta property="og:image:height" content="1200">
<meta property="og:image" content="https://github.githubassets.com/images/modules/open_graph/github-mark.png">
<meta property="og:image:type" content="image/png">
<meta property="og:image:width" content="1200">
<meta property="og:image:height" content="620">
<meta property="og:image" content="https://github.githubassets.com/images/modules/open_graph/github-octocat.png">
<meta property="og:image:type" content="image/png">
<meta property="og:image:width" content="1200">
<meta property="og:image:height" content="620">

<meta property="twitter:site" content="github">
<meta property="twitter:site:id" content="13334762">
<meta property="twitter:creator" content="github">
<meta property="twitter:creator:id" content="13334762">
<meta property="twitter:card" content="summary_large_image">
<meta property="twitter:title" content="GitHub">
<meta property="twitter:description" content="GitHub is where people build software. More than 40 million people use GitHub to discover, fork, and contribute to over 100 million projects.">
<meta property="twitter:image:src" content="https://github.githubassets.com/images/modules/open_graph/github-logo.png">
<meta property="twitter:image:width" content="1200">
<meta property="twitter:image:height" content="1200">

<meta name="request-id" content="1A01:0C2C:5528E9A:9E49CAC:5DEE9315" data-pjax-transient>

  <meta name="google-site-verification" content="KT5gs8h0wvaagLKAVWq8bbeNwnZZK1r1XQysX3xurLU">
<meta name="google-site-verification" content="ZzhVyEFwb7w3e0-uOTltm8Jsck2F5StVihD0exw2fsA">
<meta name="google-site-verification" content="GXs5KoUUkNCoaAZn7wPN-t01Pywp9M3sEjnt_3_ZWPc">

<meta name="octolytics-host" content="collector.githubapp.com" /><meta name="octolytics-app-id" content="github" /><meta name="octolytics-event-url" content="https://collector.githubapp.com/github-external/browser_event" /><meta name="octolytics-dimension-request_id" content="1A01:0C2C:5528E9A:9E49CAC:5DEE9315" /><meta name="octolytics-dimension-region_edge" content="iad" /><meta name="octolytics-dimension-region_render" content="iad" /><meta name="octolytics-dimension-ga_id" content="" class="js-octo-ga-id" /><meta name="octolytics-dimension-visitor_id" content="9181517036669959358" />

  <meta name="hostname" content="github.com">
<meta name="user-login" content="">

  <meta name="expected-hostname" content="github.com">

  <meta name="js-proxy-site-detection-payload" content="MGI2Y2FmZTFkZGZmNTZhODI3YjQyNDI0OGI0OTAyYmVlYmRiNDI3YWQwYTg3MjgwMTFmOTY5YzZlNzZhNWM4MXx7InJlbW90ZV9hZGRyZXNzIjoiMTc0LjIyNC4xNDMuMTQ0IiwicmVxdWVzdF9pZCI6IjFBMDE6MEMyQzo1NTI4RTlBOjlFNDlDQUM6NURFRTkzMTUiLCJ0aW1lc3RhbXAiOjE1NzU5MTYzMDksImhvc3QiOiJnaXRodWIuY29tIn0=">

<meta name="enabled-features" content="MARKETPLACE_FEATURED_BLOG_POSTS,MARKETPLACE_INVOICED_BILLING,MARKETPLACE_SOCIAL_PROOF_CUSTOMERS,MARKETPLACE_TRENDING_SOCIAL_PROOF,MARKETPLACE_RECOMMENDATIONS,MARKETPLACE_PENDING_INSTALLATIONS">

<meta name="html-safe-nonce" content="2e93e1ba314514092af4ee5f423c46d342c09e14">
Skip to content 
  <div class="header header-logged-out width-full pt-5 pb-4" role="banner">

Two-factor authentication

Security key

When you are ready to authenticate, press the button below.

<button type="button" class="btn btn-block js-use-security-key mt-2 js-webauthn-autofocus" data-retry-message="Retry security key" hidden

Use security key

Press the button on your security key…

Authenticate with your security key… 

    <noscript>

Enable JavaScript to use one of your security keys.

Use a different browser/device to use one of your security keys.

Security key authentication failed.

Success! 

    <input type="hidden" name="response" class="js-u2f-auth-response">

Security key

This browser doesn’t support security keys. Learn more

 
  </main>

    <div class="footer container-lg p-responsive py-6 mt-6 f6" role="contentinfo">
<ul class="list-style-none d-flex flex-justify-center">
    <li class="mr-3"><a href="/site/terms" data-ga-click="Footer, go to terms, text:terms">Terms</a></li>
    <li class="mr-3"><a href="/site/privacy" data-ga-click="Footer, go to privacy, text:privacy">Privacy</a></li>
    <li class="mr-3"><a href="https://help.github.com/articles/github-security/" data-ga-click="Footer, go to security, text:security">Security</a></li>
      <li><a class="link-gray" data-ga-click="Footer, go to contact, text:contact" href="https://github.com/contact">Contact GitHub</a></li>
</ul>
You can’t perform that action at this time. 
<script crossorigin="anonymous" integrity="sha512-mdrBasYG+QjgS391PSyVkPr06io3gWplCVbPscguetNEHxIEt+mZwCeCxPR9eMNfda6qNuibNFqBo5ak2+O/hg==" type="application/javascript" src="https://github.githubassets.com/assets/compat-bootstrap-99dac16a.js"></script>
<script crossorigin="anonymous" integrity="sha512-70iNd/Gg+yLXPhfcelP5Zr8W3AA2fp2GsH2O/ZLbKoNOS51UGEKF/twbq+aS7x15R9F80cENGrgErdVG5frxqQ==" type="application/javascript" src="https://github.githubassets.com/assets/frameworks-ef488d77.js"></script>

<script crossorigin="anonymous" async="async" integrity="sha512-Rnyd5a4qyalETTS0gsj9bWHE8X6UPdswB1oGadQYZ0Z7soB1Qi+uXp4kQCtphcR8Qu44YHrOmn3RpnMgpERXNg==" type="application/javascript" src="https://github.githubassets.com/assets/github-bootstrap-467c9de5.js"></script>
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.
Clone this wiki locally